The people living there thought Jews and Christians were inferior to Muslims and should have to endure humiliating restrictions on theif lives and pay discriminatory taxes.
"From the early years of Islamic civilization, Muslim jurists, basing on Qur’anic directives, devised an elaborate hierarchy in which monotheistic non-Muslims, such as Christians and Jews, would be “protected” at a low level and tolerated as second-class citizens. Guidelines for their treatment were embodied in the “Pact of ‘Umar.” Limitations on the status of non-Muslims included discriminatory clothing regulations and occupational restrictions. Non-Muslims were required to pay a poll tax (
jizya) as well as discriminatory taxes on agricultural produce."
At times tolerant, at other times intensely intolerant, Spain’s intergroup relations formed a fragile coexistence of Muslims, Christians, and Jews. Although often tenuous, the coexistence of diverse languages, peoples, and religions produced an extraordinary symbiosis and distinctive...
www.neh.gov
What the Arabs could not forgive the British or the Jews for is the loss of their special status in their apartheid states.
Far from the British giving the land to Jews. despite their early promises, by 1930, it became clear they planned to give it to the Arabs. Although the British had initially promised the Jews a homeland in Palestine and encouraged immigration, by 1930, it was clear they had changed their minds and were about to reverse their policy, now favoring the Arabs. They took 77% of Palestine to create the Arab state of Jordan, passed laws restricting where Jews could live, tried to end Jewish immigration to Palestine, and published a white paper presenting the bogus argument that the land was too small to accommodate anymore Jewish immigration, despite the fact that the Jews provided three brigades to fight alongside British and Australian special forces and the Arabs supported the Nazis, the British built twelve concentration camps in Cyprus in which Jews who attempted to reach Palestine were imprisoned. British attitudes towards Jews in Palestine came closer and closer to Nazi or Muslim attitudes towards Jews, and the British were deservedly vilified in the West for their actions against the Jews in Palestine and kicked out of Palestine by the Jews, soon to become Israel, just as the British kicked the Jews out of England in 1290.
All of this because the Muslims refused to treat Christians and Jews as equals under the law.