No... it isn't (as there are 100s of thousands of Muslim, Christian, etc. citizens in Israel). I am assuming you are a foreign national and you are referring to the Law of Return.

Currently, there is a prohibition on using that right and "professing" another religion. Blame the haredi, according to my granfather they're as*holes.

You could get a visa and naturalize like anyone else that is eligible.

I am eligible because my great grandmother was there before statehood in the Irgun.