Land ownership didn't entitle the Jews to start a country. Power did. Just like the way any other country started. Might makes right then, still does today.
I find it true, but disappointing.
Why do I look for another form of justification? I don't really know.
I guess the real question should be "Should the rest of the world allow the Palestinians to waste their national resources to get their A's kicked some more?" or should we allow the Jews to handle it, in a more traditional, and more permanent way?
I think it's an illusion. A few palestinian terrorists cause death and destruction in Israel but on the small scale. The israeli military responds by killing a few more terrorists in Palestine, but they don't drive the rest of the palestinians out. They do not appear to be at war with each other in any signification way.