Apparently some Jewish People were offended by how Corbyn pronounced "EpSHtein" in the Debate, allegedly in an attempt to make him sound more Jewish?
I have been following the story in question, and was genuinely not aware there was a "correct" and "incorrect" way to pronounce said name before last night - never mind that any particular one betrays AS tendencies
If you go out of your way to pronounce Epstein with an "Sch" sound for the S, you're clearly going for a very Jewish pronunciation...but that's not necessarily anti-Semitic. It depends on context and what Epstein's preference was in life.