His life is ruined. His name is Mudd. He's going to have to make a living somehow. Can't expect the Proud Boys to carry him forever. And that money they raised will run out soon after everyone gets their cut.
Defamation suits can be highly lucrative.
There's no way you could be sued and the guy needs a padded room for a while (that was a crispy tart of a rebuttal comment BTW - well done).
I honestly wouldn't be surprised if those right wing it's try something like this against CNN or MSNBC, Washington Post, etc. I wouldn't put it past them at all.