The best argument for having a Nation of Palestine is that it would make Israel safer... Until then Israel will be seen as the aggressor by the Arab nations and, in being seen that way, is less safe...
This is really a no-brainer... I find it interesting that a very large number of Israelis agree... But, like the the US, the right wing has controlled the conversation in Israel so don't expect any change until the Israelis figure out how to wrestle their government back from the hard liners...