I don't necessarily disagree that on a personal level many of them may not care or hold specific antisemitic beliefs about like "Jewish capital" or "Jewish media" those sorts of things which are very explicitly in the realm of Nazis.

But the people on the right who do currently and historically push narratives they buy into and such tend to be antisemitic explicitly or very thinly veiled.

It seems to be one of the problems with rejection of agency propaganda and neoliberalism is it leads you to only a few paths. You can pick up Marxist viewpoints where you see that there is no race or ethnicity controlling everything but rather a self-interested domineering capitalist class. And you can trace back the history with Marx holding your hand and see that this is very probably the truth of it. He nailed it back in the mid 1800s.

Or if you reject Marx because you are racist or find it easier to believe or, probably true for many Americans, you were told by literally every institution growing up that Marx was a fraud and communism sucks blah blah. Then maybe you see similar observations "all these people are hoarding wealth and knocking off world leaders" and someone else helps nudge in the puzzle piece of "how many of them are Jewish?" Without any real grounding in real history, without a proper analysis of capitalism and neoliberalism now days and their effects on liberal democracies, it's easier to lean into the available racist theories and remain ignorant of exploitation, primitive accumulation and such.

OR the rarest breed of right winger. the ones who aren't racist, do understand a Marxist view of the world and then actively choose to be on the side of capital. Like they invert the entire point of reading Capital. Maybe they're cynical and see this as inevitable so someone might as well profit and it should be them. I say these types are rare because while maybe a lot of republican types might ascribe to some ideology along those lines, just by the numbers most are not capitalists, they're just wage laborers with a backwards view of things.

So I guess overall, maybe a lot of them don't actively know they hold racist beliefs, but if you ask them "why?" enough times down the rabbit from "why JFK?" it will lead, probably, to a controlling group of wealthy people and if you into that with them I don't imagine the outcome will be not-racist, I'll just say. Because fundamentally right wingers love private property, they think accumulating wealth is fine and ethical, etc. so the capitalists as described by Marx can't be a nefarious class just as they are. They have to have some special element that makes them "actually bad" because random Joe Republican wants to accumulate $1B too. But he thinks he's the good guy. So how can he condemn this guy who does have $1B? Well, he's Jewish or Arab or Chinese, etc. and those immutable traits explain, to them, why those capitalists are evil and bad and doing conspiracies, but also, some capitalists like Trump, Peter Theil, Elon, can be good.