If I had to make a bet, I'd say that there are more people who some people would call anti-Semites among Trump's supporters than there are among those of his opponent.

Even the most ardent Trump supporter would have to say, "Maybe"

So, can we tar the candidate with the attributes of his supporters?

JFK once said that in politics there are not friends and enemies - there are allies and opponents.
That is you say, someone could be your ally on one issue and your opponent on another.
He had to say that.
Without the support of most of the Jim Crow states, he never would have been elected.
Nevertheless, no one in his right mind would call, JFK, who sent federal marshals into southern schools to enforce court-ordered segregation, a racist.