when leftists use an antisemitic template but target it at capitalists, what they are saying, at least historically, is not “the capitalists are jews” / “the jews are capitalists” but rather “the antisemites are wrong; it’s not the jews that are the problem, it’s the capitalists”. they are willing to entertain a conspiracy but find the jewish people innocent.
but then the nazis came along and did make those equations, which of course makes it impossible to tell just from the denouncement of capitalists whether some·one is a leftist or a nazi, and the leftists never really figured out how to counter that