Amin Al-Husanyi, the Grand Mufti of Jerusalem, was the "leader of the Arab Revolt" of whom you wrote there, was a loathsome character, but no, he did not "help spark" The Holocaust- Hitler had written letters to friends as early as 1919 calling for the extermination of the Jews. He never, at any point between 1919 and 1945, renounced that objective. Contrary to Mr. Netanyahu's delusional assertions, Hitler would never have been satisfied with simply creating a "Judenrein" Europe through Jewish migration to Madagascar or the Mandate.
Implicating the Grand Mufti in this is an attempt to create a kind of Palestinian "original sin" on the Holocaust that has no basis in reality buy could be used to justify everything the Israeli government, the IDF and the illegal West Bank settlers have done to ordinary Palestinians. It won't wash- the Holocaust was solely the work of Europeans.