I can't comment on that, not keeping track of name calling on a regular basis.
But if you think about it, why would someone call someone else a moron?
Maybe because they themselves are so much of a moron that they can't think of another way to verbalize disagreement?
Although, I did find it funny and fitting that Dr Fauci, who's no moron, called one of his Senate harassers a moron, the other day when he didn't realize his mic was still on.
So, maybe I'm wrong, but then again I qualified it by "usually".