No he isn't. What he is, is an attempt for Republicans to finally make abortion a federal crime. Like Clinton went along with NAFTA, RFK JR. would sign a federal abortion ban into law.RFK Jr. is a problem, no doubt about it
He questions the vaccine cult and the climate cult. Ordinarily you can just trash him as a loon, but he is DNC royalty, part of Cameltoe, so they can't trash him like they ordinarily would anyone else.
So the best thing to do is ignore him.

RFK Jr. Endorses Federal Abortion Ban Then Quickly Reverses Himself
The Democratic presidential candidate's campaign said he misunderstood the question “in a crowded, noisy" event in Iowa over the weekend.
Like I said, this man is not a Democrat. He can try to run as one but that don't make it so.