Actually, Alex Jones has at least once admitted that one of his fantasies was wrong. So far as I've been able to check, Musty has never abandoned a fixation, no matter how much evidence shows it's wrong.
No, I don't think musterion ever has. Even when the fake photos musterion posted here were proven to be photoshopped, as far as I've seen, he's never retracted them.
Regarding the conspiracy-monger Alex Jones: predictably, he's already called Charlottesville a false flag designed to "bring in martial law and ban conservative gatherings." Calling these terror attacks false flags - that use actors - causes the victims' families real anguish.
Scott Baio then showed poor judgment (again) by retweeting (and later deleting) a meme claiming that Charlottesville used the "crisis actors used in Newtown," causing the sister of one of the Newtown victims to post in reply: