There are several things to note here. There was nothing here about bougie stereotypes which is where left-wing antisemitism springs from. The secret cabal/conspiracy theory type stuff that was covered in the survey is more alligned with right wing antisemitism. There are many more manifestations of antisemitism than the three things they covered in this survey.
There is also what people are willing to say in public. Liberals may say they don't view Jews as more loyal to Israel when directly asked about it to be PC, but their going ape**** anytime a Jewish celebrity or political figure says something even remotely positive or even just not negative about Israel says otherwise.
[Citation needed]