These are the two posts that make the analogy and that, I think, are woefully flawed:
While both Jews and African Americans have faced terrible prejudice in the US, I think the specifics of the injustice are highly salient when analyzing the differences between achievement levels of Jewish and African American students (as well as when analyzing other differences). The suggestion, implicit or explicit, that both Jews and black people have faced oppression, but Jews do well in school but black kids don’t, so there must be a genetic cause, is very silly.