People make this all so complicated
There is always an enemy, people need an enemy it's wired into us and people that realize it use that to their advantage, as a species we harbor it
even though there is no actual threat to us as a species we practice and keep this trait because it's fundamental; to life, we will have real enemies
one day or can so the trait preserves itself on the chances of a new threat species evolving or even maybe arriving from elsewhere, in the meantime
until that days Jews and Arabs and Koreans and everyone else will create enemies where none exist.
Trying to create reasons for it is mental masturbation, it's psychology of rationalization in the end we choose to have enemies, even within the
nation liberals vs conservatives moms against fun, whatever, people will find enemies always. Regan had it right the only way humanity will unite is
against an external threat