Because jews are a protected class. Just like blacks and alphabets. Whites, christians, and men, can be ripped apart constantly but we can't talk about the juden.

Typically no, I wouldn't trust Amnesty International. AI is a vile organization that makes up shit all the time. And there isn't anything on here that actually says "areas where non-jews are prohibited from entering" or anything of the sort. The closest is this:

For example, Palestinian citizens of Israel are denied a nationality, establishing a legal differentiation from Jewish Israelis. In the West Bank and Gaza, where Israel has controlled the population registry since 1967, Palestinians have no citizenship and most are considered stateless, requiring ID cards from the Israeli military to live and work in the territories.

This statement, along with the others, suggest that Palestinians have a problem getting Citizenship, and those whom are classified as Permanent Residents, don't have freedom of movement. This is not the same as "non-jews are prohibited from entering". If your statement is true, there should be some place in Israel where Christians, Hindus, Atheists, Muslims, etc; are explicitly barred.