The American Muslim block has been getting quite close to Israel over the years whilst they can be hostile toe each other and are quite hostile to the non-US Muslim states like Syria and Iran. So that would probably not start a Muslim vs Jew war. Not unless their religious fervour overcame the political agendas of their nations which I guess seeing as they are Muslims it is possible but I still think it's unlikely.

If Iran tried to intervene through Syria and Lebanon the Turks and Jordanians are far more likely to take the chance to invade Syria than to fall in with them.