Bullshit, because the entire idea of a nation state only emerged in the 1600's... Before that it was monarchs, your monarch died, tough shit, keep wondering till you find a new one..
Negative. Palestine may not have had that name, but it existed under the Palestinian Mandate in the mid 20th century, before the UN carved out the land and gave it to Israel. It's as much their land as anyone else's. The only reason Israel has it is because the Torah said that the Canaan region is their holy land. Jerusalem is sacred to 3 religions. Can you blame the Palestinians for being angry?
Yes, you can, but a better anger is the one fro them being stupid and having everything they needed to create a state, not once but TWICE and they fuck it up every time.. EVERYtime!