I hear this a lot, particularly in arguments from the religious right. I understand that On the Jewish Question is very confusing to read because of how the word "jew" was equated with "usurer" in the 19th century leads to this conclusion - this is often used to discredit all of Marx's work.
Was he, or is this another case of misinterpretation?
revolutions podcast did a couple of episodes on marx and bakunin at the start of the russian revolution episodes. he does go over this as well