Not just anti-vaxx, but also antisemitic conspiracies.

But he's anti-vax. Or at least a "vaccine skeptic." While there are certainly those on the left who are anti-vax, I'd say that's more typically a position of the right (though of course not all are anti-vax). And he's not quiet about it either.

There's a huge number of people out there who are fed up with both parties and see those parties as equally (or near enough) bad. He's appealing to those who dislike Trump and Biden. Don't underestimate his ability to play spoiler to one of them.

? Seems more likely to appeal to MAGA conspiracy theorist voters than to Dems.

It is true he was paid by the GOP to split the vote among Democrats, but I believe it has backfired if RFK Jr is running independent so soon into the election cycle. Several stories have come out about the GOP and Trump being worried about this move. Usually, federal abortion bans and right wing conspiracy theories don't appeal to left wing voters the same way they appeal to right wing voters. Add the fact that there are so many right wing conspiracy theories that say that the Kennedy family will somehow save Trump and give him control of the government, at a time where it looks like trump will likely go to prison for the rest of his life, and Kennedy becomes a conservative super hero. Also, Kennedy was given time to speak during CPAC, which has given him exposure among conservatives in a way that he hasn't received among left wing people.

There are a ton of reasons I am cautiously optimistic that RFK Jr. will end up tanking Trump or whoever Trump's replacement will be if Trump ends up in prison before the election. I still plan on voting and encouraging others to vote despite this turn of events.