You make huge claims and yet provide no evidence or textual support. You admit not having read Marxist literature in “some decades” yet you provide new historical interpretations that I’m not aware any serious scholar of Marx puts forward.
It’s true that emancipation typically led to assimilation. That does not make emancipation an anti-Semitic idea. It’s like saying that fighting against discrimination of Jews in the workforce is anti-Semitic because it may lead to some Jews joining jobs that will cause them to assimilate.