Trump is blaming the Jews
in advance, if he doesn't win :
“If I don’t win this election … the Jewish people would really have a lot to do with that if that happens, because at 40 percent that means 60 percent of the people are voting for the enemy,”
This is wrong for so many reasons, among them :
Calling the political opposition 'the enemy'. This is authoritarian bilge. Un-American, fascistic, hateful, subversive.
Singling out any particular group for blame or scape-goating (he does it all the time, of course) is un-American, subversive, immoral, racist, threatening. There are lethal historical precedents for this sort of talk, which everyone, including Trump himself, understands. Its fear-mongering of the worst sort.
He presumes to know Jewish-Americans' interests, in the aggregate, better than they do themselves. Because he is an idiot, that amounts to a tremendous insult to all the people he's condescending to.
He thinks American Jews 'owe' him their vote. No one, no group, 'owes' any party their vote. Talking that way is the talk of a despot.
otoh, if after the fact that Trump is defeated American Jews, speaking for themselves, want to claim credit, that would be grand.