I’d go even if they had a panel consisting of a tankie, a nazi, a pedo, and an IRS agent

I responded in what I think is the spirit of the question. If I were being pedantic, "poorly framed" might be more accurate. Since I don't have direct access to anyone's internal beliefs but my own (and maybe even that is debatable), I have to assess others' beliefs based on their actions. There are certainly actions a person could perform (speech and otherwise) such that I would not attend an event where they were speaking.

(and so I don't care at all about the internal beliefs to which I have no access. someone can believe any abhorrent thing they want and that's just fine if I can't tell!)

@jcb Good point, yeah. I'm much more concerned about actions than beliefs for that reason.

I personally draw the line at a history of spreading hate speech of any kind - if someone's spreading that, they don't deserve a platform at an event like this, IMO.

I assume the title is meant to say "Manifest"?

@jcb Oh sorry I tried to fix that

What should the line be? And can you make a question to figure it out without upsetting everyone?

I attempt here: https://manifold.markets/NathanpmYoung/what-is-the-most-bad-thing-someone

What is the most bad thing someone could currently believe but you'd still be happy for them to speak at Manifest

This resolves n/a. Bets aren't anonymous. If you can think of a better version of this, go for it. I also made this. https://manifold.markets/NathanpmYoung/there-is-something-that-a-person-co