By your flawed logic there is no such thing as Nigeria, Cameroon, Ghana, or any other colonized African and Arab lands. Jews had NO RIGHT, I mean NO right to just up and take land. Just like the white Americans had no right to take the land from Native Americans. You think that Native Americans today are happy that they were pushed out of their homeland. Not only pushed out but their culture completely changed and erased. If Israel give the land back in piece, so did the US, they were called Reservations. This no different than the Gaza Strip and Golan Heights. Guess what's going on in the Golan Heights, Jewish people are settling and pushing out the native residents. Yeah there isn't a Palestine and by that logic neither is their really a Nigeria, Cameroon, or any African country created during colonization. You can also make the same claim for the US.
Here is the reality, it would be inhumane to punish and push the Jews out of Israel and it would also be inhumane to push out the Palestinians. I think the end solution is probably the destruction of one of the groups. Just like the white man destroyed the different Native American tribes.