So many people would have "rights to their ancestral homeland" then.... History is full of conquest and expulsions and genocide. Arabs and Celts were both drive

So many people would have "rights to their ancestral homeland" then.... History is full of conquest and expulsions and genocide. Arabs and Celts were both driven out of what is now my country, at points over a millennium ago. Shall their descendents be entitled to claim part of it as an ethnostate for themselves? Of course not, for that would be ridiculous. Having colonial powers create an state in a place where people already lived, and which did not consent to its creation, was a terrible terrible idea that led to tremendous suffering a loss of life over the past 75 years. Acknowledging this is not antisemitic.