The Bible actually says that the Israelis were there first. Also, the Israelis don't have another homeland either, so your argument is weak. Finally, this "God that gave it to us," is the God that created the world, he created you, your parents, everything. Yet, you question his ability to give people land?
The land belongs to the Israelis because they captured the land in a fair war, so it's now rightfully theirs. On top of that, the Israelis protected their land through many wars. It's not fair for the Palestinians to wage war, and then demand the land even after they lost it in a fair fight.
The Israelis were forced out, they didn't have a choice in the matter. Also the Israelis would "keep God company" as well as the Palestinians, what evidence shows that Palestinians keep better company? Also, what makes you believe the Israelis broke their covenant with God? They didn't wrong God in any way.