You mention "real natives". However, assuming evolution to be correct, all humanity has one common ancestor, and one "original homeland". All other land was colonized indirectly from there.

What I'm trying to get at, really, is that the land belongs to no one group. If someone tries to force you out of your home, sure, you should resist them - but it's wrong to claim certain pieces of land just because one's ancestors lived there.

Or maybe I'm wrong. I don't actually know a lot about the whole Israel/Palestine thing. Maybe we need to keep better track of one's possessions: Like if Bob steals something from Alice and gives it to his children without telling them he stole it, then it's passed down through the generations, but it still really belongs to Alice('s descendants) right?

But anyway try not to group people together too much - what of someone with both Jewish and Palestinian ancestors?