Conspiracy theories about Jews are perennially popular. The ones about the Rothschilds go all the way back to the Napoleonic wars.
But why Jews? One of the reasons has got to be that Jewish people are unusually successful, and ideas similar to those behind equity suggest that there must be some external reason for it. Rather than think that a successful group must be doing something right and should be emulated, they see the disparity as evidence of a conspiracy.
This is why I think some of these ideas are actually dangerous. When the majority is more successful, it’s a reasonable suspicion that some kind of prejudice or institutional bias could be responsible, and definitely worth investigating. But if you categorically state that all groups should achieve the same, what does that say about minorities who are over-represented in a given area?