'But bigots of the past were playing 4D chess!' is a brave opinion to offer.
Nobody invented antisemitism as a clever scheme. It's always been ad-hoc justifications and libelous story-telling, to bolster the kneejerk conclusions of ingroup supremacists. Rational argument has to be taught - tribalist pretense is instinctive to all people. Grifters emerge to take advantage of them, and spread the bullshit, but that dirt was always in your brain.