Jews vote for the Democrats by wide margins.. Like 3-1. Hence the statement "Most (i.e. over 50%) support the Left" is objectively factual.
Is it anti-Semitic to make note of that?
Making a fair and accurate statement is not evidence of anti-semitism.
However, if someone uses language to evoke hostility, suspicion, fear, contempt or disgust toward ANY category of human beings — THEN — even a factually true statistical statement can be used for noxious purposes.
There are MANY demographic groups which, historically, have voted predominantly for Republicans or for Democrats OR for right-wing candidates or left-wing candidates.
So what? Why even bring that up unless your purpose is to make some adverse point (perhaps in coded language)