Not sure I have seen The Truth told on this issue in a more gentlemanly way than Douglas Reed does with this work.Everything he was confronted with in his day,we see compounded here many years later,and the Truth still stares us in the West in our faces...

... For ten years after the foisting of "the Mandate" on the British people the pretence was continued that the "Jewish National Home" in Palestine, under their protection, would be simply "a cultural centre" of Judaism, harmless to the Arabs; a Judaist Mecca with university, library and farm-settlements. The Arabs were never beguiled; they saw that they were the objects of an attempt to reinforce, in the 20th Century AD, the Law of violent dispossession set up by the Levites in the 5th Century BC. They responded with riotous protest and warlike uprising which have never since ceased, so that "the war to end war" started warfare without end.

At once it became apparent that Zionism had been inserted like a blasting charge into the life of peoples and that in "a small country the size of Wales or Vermont" (just "liberated" from the Turk) the timefuse of a future world-conflict had been planted. Nevertheless, a new British Colonial Secretary, Mr. Leopold Amery, went to Palestine in 1925 and (he says) "frankly told the Arabs that there was no possibility of change in the British policy" (Jewish Telegraph Agency) .

These words (like Mr. Balfour's earlier statement that British policy in this question was "definitely set") contain the central mystery and challenge. In what other issue in history was a reversal of policy ever declared to be impossible? This policy had been proved impossible of fulfilment, and disastrous. What power dictated that it must be pursued in those or any circumstances whatever? No British or American political leader ever explained this secret capitulation to the electorate, to Parliament or to Congress (in the 1950's statements similar to those of Mr. Balfour and Mr. Amery were often made in America, as will be seen).
https://exploringrealhistory.blogspot.com/2020/01/part-13the-controversy-of-zionthe.html