Circumstances around Abdu'l Baha's knighthood (KBE)

On September 23, 1918, during World War I, General Allenby's British forces captured Haifa from the Ottomans, an event which Shoghi Effendi in 1936 would refer to as "the liberation of Palestine." In 1920 'Abdu’l-Bahá would be ceremonially knighted in "a most wonderful celebration."

September 23. On this date in 1918, during World War I, General Allenby's British forces captured Haifa from the Ottomans, an event which Shoghi Effendi in 1936 would refer to as "the liberation of Palestine." Two years after General Allenby's conquest, 'Abdu’l-Bahá "was created by King George V a K.B.E. for valuable services rendered to the British Government in the early days of the Occupation" was ceremonially knighted, an event which the "Star of the West" reported as "a most wonderful celebration."
According to Harry Charles Luke, an official in the British Colonial Office who served as assistant Governor of Jerusalem,

Sir 'Abbas Effendi 'Abdu'l Baha had travelled extensively in Europe and America to expound his doctrines, and on the 4th December, 1919, was created by King George V a K.B.E. for valuable services rendered to the British Government in the early days of the Occupation.

On April 27, 1920, 'Abdu’l-Bahá was ceremonially knighted, an event which was prominently reported in the Bahá'í periodical Star of the West.

THE following beautiful description of this event was written by Dr. Zia M. Bagdadi who was at that time in Haifa: "Among the kings and governments of the world who have become convinced that Abdul Bahá was the well-wisher and the lover of mankind are King George and his government. The King sent a medal to Abdul Bahá with the title, "Sir", thus making him a member of his household. On the 27th of April, 1920, the Governor and high officials of Haifa, Palestine presented in a beautiful garden a most wonderful celebration for the knighting of Abdul Baha. Bahai pilgrims from Persia, America and all parts of the world were present. Mohammedan, Christian, Jewish leaders, clergymen, notables and local officials from Haifa, Acca and other towns attended. A tent was pitched in the center of the garden. English troops stood on both sides, from the gate of the garden to the center where Abdul Bahá was seated. The military music added wonderful melody to the rustling leaves of the beautiful trees. The breezes of the spring on that sunny afternoon imparted a remarkable vigor to the physical body just as the presence of Abdul Baha strengthened the souls. The Governor stood behind Abdul Bahá and, after a short speech, interpreted by Mr. Wadie Bistani, presented the medal. Then Abdul Baha, rising from his seat, gave a brief talk and a prayer for the British government.

There have been many people who, for various reasons, have refused British honours. Included among them are scientists like Francis Crick and Michael Faraday, musicians like David Bowie, and even devout British imperialists like T.E. Lawrence and Rudyard Kipling.
Benjamin Zephaniah refused his honour, stating "I get angry when I hear the word 'empire'; it reminds me of slavery, it reminds me of thousands of years of brutality, it reminds me of how my foremothers were raped and my forefathers brutalised."
Muhammad Ali Jinnah, the founder of Pakistan, was offered a knighthood in 1925, but replied, "I prefer to be plain Mr. Jinnah."
Kenneth Williams bluntly put it in these terms: "When offered something which obviously isn't worth the price ... we still have the right to say 'No thanks.'"
Nitin Sawhney refused for ethical reasons, saying "I wouldn't like anything with the word 'empire' after my name."
'Abdu'l-Bahá held none of these objections and accepted his knighthood with great pomp and ceremony, in "a most wonderful celebration"
The Chosen Highway chronicles in some detail how 'Abdu'l-Bahá aided the British against the Ottomans during World War I. For example...

We learned that when the British marched into Haifa there was some difficulty about the commissariat. The officer in command went to consult the Master.
"I have corn," was the reply.
"But for the army?" said the astonished soldier.
"I have corn for the British Army," said 'Abdu'l-Bahá.
He truly walked the Mystic way with practical feet. [footnote: Lady Blomfield often recounted how the corn pits proved a safe hiding-place for the corn, during the occupation of the Turkish army. -Ed.]

and [later...}

The British Government, with its usual gesture of appreciating a heroic act, conferred a knighthood upon 'Abdu'l-Bahá 'Abbas, Who accepted this honour as a courteous gift "from a just king."
The dignitaries of the British crown from Jerusalem were gathered in Haifa, eager to do honour to the Master, Whom every one had come to love and reverence for His life of unselfish service. An imposing motor-car had been sent to bring 'Abdu'l-Bahá to the ceremony. The Master, however, could not be found. People were sent in every direction to look for Him, when suddenly from an unexpected side He appeared, alone, walking His kingly walk, with that simplicity of greatness which always enfolded Him.
The faithful servant, Isfandiyar, whose joy it had been for many years to drive the Master on errands of mercy, stood sadly looking on at the elegant motor-car which awaited the honoured guest.
"No longer am I needed."
At a sign from Him, Who knew the sorrow, old Isfandiyar rushed off to harness the horse, and brought the carriage out at the lower gate, whence 'Abdu'l-Bahá was driven to a side entrance of the garden of the Governorate of Phoenicia.
So Isfandiyar was needed and happy.

Further collaboration is documented in Chapter V: Danger to 'Abdu'l-Bahá, His Family and Friends, and How it was Averted
On March 11, 1936, Shoghi Effendi wrote a letter later published as The Unfolding of World Civilization, a document included in the book titled World Order of Bahá'u'lláh
Within the The Unfolding of World Civilization are sections, such as one entitled Collapse of Islam, in which Shoghi Effendi summarizes late Ottoman and early Turkish Republican history in these terms...

The murder of that arrogant despot in the year 1876; the Russo-Turkish conflict that soon followed in its wake; the wars of liberation which succeeded it; the rise of the Young Turk movement; the Turkish Revolution of 1909 that precipitated the downfall of ‘Abdu’l-Ḥamíd; the Balkan wars with their calamitous consequences; the liberation of Palestine enshrining within its bosom the cities of ‘Akká and Haifa, the world center of an emancipated Faith; the further dismemberment decreed by the Treaty of Versailles; the abolition of the Sultanate and the downfall of the House of Uthmán; the extinction of the Caliphate; the disestablishment of the State Religion; the annulment of the Sharí’ah Law and the promulgation of a universal Civil Code; the suppression of various orders, beliefs, traditions and ceremonials believed to be inextricably interwoven with the fabric of the Muslim Faith—these followed with an ease and swiftness that no man had dared envisage. In these devastating blows, administered by friend and foe alike, by Christian nations and professing Muslims, every follower of the persecuted Faith of Bahá’u’lláh recognized evidences of the directing Hand of the departed Founder of his religion, Who, from the invisible Realm, was unloosing a flood of well-deserved calamities upon a rebellious religion and nation. World Order of Bahá’u’lláh, page 175

Three thoughts from this passage:
1) Shoghi Effendi considers the British seizure of Palestine a "liberation." By the time World Order of Bahá’u’lláh was published in 1938, the British had permitted the immigration of hundreds of thousands of Jewish settlers to Palestine, and in 1937 the Peel Commission proposed a partition of Palestine into Jewish and Arab sectors. The proposal was rejected by both the Arab and Jewish leadership. It is not mere conspiratorial inklings that lead detractors to consider the Bahá'í Faith to have ties to Zionism or British and Russian Imperialism.
2) Shoghi Effendi refers to "the further dismemberment decreed by the Treaty of Versailles" of the Ottoman Empire. The Treaty of Versailles was signed between Germany and some of the Allied nations, and it did not pertain to the Ottoman Empire. The Ottoman Empire would cease hostilities with Allies through the Armistice of Mudros, and Treaty of Sevres that was signed at the end of World War I was never ratified by the Ottoman Parliament in Istanbul. The nascent Republic of Turkey would later sign the Treaty of Lausanne with the Allies.
3) Shoghi Effendi describes the suffering of Ottoman subjects in World War I to have been "well-deserved calamities" unloosed by the "directing Hand" of Bahá'u'lláh. One wonders how anyone can equate Bahá'u'lláh's exile, where he was still allowed to lead his religious community and publicly declare himself Him whom God shall make manifest, with the suffering of World War I