"Israel has always been multicultural but the Arabs have never accepted that, they have always claimed the state for themselves and attacked the Jews many times
Even today that's what they want, an Arab Islamic state not a secular state where all religions are tolerated." David
Prior to the huge rise in Jewish migration to Palestine, Arabs (who were Muslims and Christian) lived quite peacefully with Jews who lived there. Arabs became increasingly concerned about being displaced by the increase in Jewish migration duting the 20's, 30's and 40's and in deed they were right to worry as they have been displaced.
When Israel was created in 1948, its Declaration of Independence promised equal social and political rights to all inhabitants regardless of religion. In practice, while Arab citizens were granted formal legal and voting rights, they faced severe restrictions, military rule, and systemic inequalities from the beginning. tbh I'm not surprised they were angry.