Why would they not? It is tradition that the left wing is split by minor differences in ideology while the right wing are united by hate regardless how contradictory otherwise.

He is a useful idiot and ultra wealthy and ultra powerful and ultra influential and ultra useful on top of being an ultra idiot. They don’t have to embrace him, only let him do his thing until he is no longer useful. Fascism must always have enemies and when they are without the external ones they will turn on each other.