His phrasing was weird and it's all kind of in bad taste, but he calls him "the ultimate evil" in the text. I'll trust a center-left Jewish voice like Yair Rosenberg when he says there's no real meat here over his opponent's conspiratorial ramblings.
What?
Are we in for some bizarre "Yair Rosenberg is a right-winger because he's not any more a fan of the far left than he is of the far right" take or something?
No he's a right winger because he has said as much on conversations that you were not privy to. Plenty of right-winger support Democrats these days - Frum, Kasich, James Comey, etc, etc.