@Baldimo,
The Jewishness of Israel is ethnic. Most Israeli Jews are secular. They're not religious. There are, of course, religious Israelis, but the country is secular. Roughly one fifth of the Israeli population is Muslim.
The Syrians' beef with Israel is that Europeans went and established an ethnocentric state in Palestine that represses the rights of the indigenous population there. Also, and more pressing, is the territorial dispute over the Golan Heights between Syria and Israel which the latter usurped after their 1967 war.