As long as they accept to live under a Palestinian state. (Normally immigration should have a path to citizenship and voting rights, but both Israel and Palestine would want to preserve the national nature of their states, as Israel already does).
I have no idea, but it's funny that some people think this is a smart question that will make them score a point.
Why would Jews want to live as the Palestinians in the West Bank or Gaza, when that means living under occupation, being subjected to Israeli military law, being powerless against settlers violence and the prepotence of Israel? And what would they do, immigrate there from New York and start a farm, with a pinky promise that they won't turn into settlers and seek to join Israel?
And of course it would be risky, when they are so easily associated with the settlers and the occupying power- no point in denying it.
Nonetheless, there are entire large Palestinian clans that claim to descend from Jews and retain some of their customs: a famous example is the Makhamra family.
Jews that became Muslim are not a good counter-example.
Jews who haven’t converted to Islam have been ethnically cleansed from the West Bank by Jordan when they occupied it, and this apartheid is maintained by the Palestinian Authority. Anyone visibly Jewish who enters areas under total PA control gets arrested (or lynched).
Why can’t Jews live under Palestinian authority the same way Muslims live in Israel? This racism has led to a situation where the only way the Jews of the West Bank can be safe is by having an IDF presence.
Your “fears” of Jews turning into settlers are no different to the Islamophobes who say Muslims who come to live in western countries will turn them into caliphates.