The claim that Jews are over-represented in fields correlated with success, such as finance (once my field), journalism, and academic disciplines such as physics, is not damaging, even if it is wrong. How would the view that Jews tend to be successful be one of the 'worst stereotypes?'
It's strange to me that you're so unaware of Jewish success that a banal claim that Jews have a high representation in some fields has you shocked.
I took a few minutes to at least get a couple sources, but honestly if the idea that Jews are over-represented in fields like physics or journalism or economics (or ivy league universities) is new to you, then you haven't done a very good job paying attention in class.
https://en.wikipedia.org/wiki/List_of_Jewish_Nobel_laureates https://en.wikipedia.org/wiki/Wealth_and_religion https://www.ynetnews.com/articles/0,7340,L-4099803,00.html
It's strange to me that you're so unaware of the anti-semitic tropes that portray a Jewish cabal controlling politics and media in the US. Perhaps you weren't paying attention in class...