Jews lived alongside Palestinians on the same land for several hundred years. Why do you assume that only Arabs have some special moral right to this land, and Jews should be expelled from it?
The fact that Jews wanted sovereignty is logical and justified by the Arabs' hatred for them solely based on their existence, regularly conducting terrorist attacks and pogroms against Jewish communities.
Even if, for a moment, we entertain the idea that Palestine has a right to national claims, why do you believe that Hamas's methods are legitimate in asserting any national rights?