I realize I didnt really answer your specific question. The issues I have with organized Jewry is primarily moral and practical. It has nothing to do with their intellectual abilities. In fact I thought the question was odd. I dont know anyone who dislikes Jews because they think they're dumb. Jews are a lot of things, but dumb isnt really one of them. I do think they tend to have simplistic black and white, left vs right views in terms of society, but this isnt because they're stupid, it's because they are extremely ethnocentric and therefore their morality and world view is based almost completely on whether something is good for them.

Anyone who is seen as being bad for the Jews is seen as evil, regardless of any other views they may have. Anyone who is seen as good for the Jews is seen as good, regardless of any other views they have. To the extent Jews tend to be left wing, this is only seen in situations where they are the minority, and this left wing view is adopted because that is seen as being safer for them. When they are the majority, IE Israel, they are actually extreme right wing authoritarians, because in that specific situation that is what is seen as being "good for the Jews".

A great example of this is the almost universal Jewish hatred of Jeremy Corbyn. Corbyn was the stereotypical bleeding heart left winger and "anti racist", and yet even supposedly left wing Jews hated his guts solely because he criticized some Jewish behavior pertaining to Israel. So their hatred of him was seen exclusively through the lens of him being bad for the Jews. This is a great example of Jewish ethnocentrism superceding any alleged political affiliation, and unfortunately we see this constantly with Jews, at least among those that actively identify as Jewish, be it ethnic or religious.