100%
You can’t go by who was on the land first.  Land/boundaries constantly evolve.    How hypocritical to tell Palestinians, Israelis were here first yet in the US, as you said, Native Americans bet the short end of the stick.  So while I have been taught that if Arab countries accepted the 1948 borders, we wouldn’t be in this situation.   But they didn’t and here we are.  If we allow Putin to take Crimea, Ossetian, etc., should we really be giving thought to giving the land back from the 1948 and Yom Kippur Wars?   

All I known is it is incredibly complicated and a lot of bad actors are involved on both sides.