Have you seen children? Empathy is one of the last things to develop. There is a specific purity of cruelty attributed to children for a reason.
Civilization is conditioned into humans as a general rule, not the other way around, and needs consistent reinforcement. Humans are eusocial, but like chimpanzees and ants where war with other "tribes" is closer to a baseline than cooperation.
Ah, so as long as you push a people/culture out of a region long enough, they no longer count as having been there. Or are you saying that the Jewish people interbred with Europeans too much after the Roman diaspora and thus Jews are no longer of middle eastern descent? Is there an argument that the Jews originated in Europe or elsewhere and not from the region surrounding Jerusalem?
I am ignoring the entire subject of the state of Israel, I'm just trying to understand the logic on the Jewish people and culture not being "already there" in the region.