I wouldn't mind a bit if Israel retained as full-fledged citizens those West Bank Arabs who proffered full allegiance (or who, at least, just wanted to be left alone) as "Israeli Arabs". As Christians, I think we have a moral obligation to support the Property Rights of dirt-poor Arab Olive-Farmers who are willing to live in peace and grow olives (mmm, olive oil.... who would cook with anything else?).
If the Arabs of the Palestine Mandate (at least, the tiny sliver between the Mediterranean and the Jordan that Britain left to the Jews) want to live in Peace with the Jews of Jewish Palestine ("Israel"), then I say "Amen". If the Arabs DON'T want to live in Peace with the Jews, then saints-and-begorrah, imagine that... there already is an "Arab Palestine" representing 80% of the original Palestine Mandate, specifically dedicated by Winston Churchill, and it's called Jordan.
Won't happen, there's never been any real support for expelling Arabs.