How many Muslims in Israel?
Far too many. That's why they have so much Jihadi terrorism in Israel, and why Israel -- like the human species -- is likely living on borrowed time.
Do the rabbis incite them to rape or its only a "privilege" for the Jewish soldiers?
No, Jihadis get their license to rape directly from Allah, as explained here:
http://thereligionofpeace.com/pages/muhammad/rape.aspx