I am curious why you think an ancestral history of brutality prevents a student from learning that 2 + 2 = 4.
And why whatever reason that is would apply, say, to blacks but not the Ashkenazi?
Can you be more specific about what it is that happens with a history of brutality to prevent a current student from learning? I’ve interviewed hundreds of candidates for med school over the years, and I actually saw quite a few neat success stories for immigrants (Vietnamese, e.g.) whose parents suffered quite a bit, but who themselves were still able to learn once given an opportunity.