My read is that people believe it's very possible (even likely) he cheated, but are also frustrated that Magnus has brought a lot of other players into this without making (prior to this) any actual statement. Even with this statement, he hasn't formally accused him or presented any proof.

I'd say the vibe of the community seems to be a general distaste for drama, rather than taking a particular side.

I'm not a strong enough player/analyst to have a meaningful opinion on whether or not Niemann cheated. It's possible he cheated.

I'm taken aback at the manner in which these accusations have been made. I guess that Magnus felt that the only way he could force FIDE and tournament organizers into action was with a big, public, shocking act.

It feels like a black eye for chess no matter the outcome. Either Niemann is proven guilty and professional chess has to grapple with that hit to its integrity, or the situation isn't resolved and the question of Niemann's (and pro chess') integrity is left open indefinitely.

I don't know to what extent Magnus has pushed for anti-cheating measures or increased scrutiny of Niemann behind closed doors, but I'll be very disappointed if it turns out that this public spectacle could've been avoided.