The Arab-Israeli schism isn't one between the rich and the poor - Israel's economic might is balanced well by oil-rich Arab states. In the same way, there are both men and women, people of varying ethnicities, different levels of education, and of different political leanings - conservative, liberal, or otherwise - on both sides.
The dividing factor, by and large, is that of religious heritage and religious belief. Worldwide, those born in Muslim families overwhelmingly and almost unconditionally side with the Palestinian struggle; and Jews and Christians, whose scriptural teachings are more in line with the Israeli cause, support Israel.
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See also:
Behold! The Jewish Jesus
