Yeah, I mean what’s Colbrelli’s angle supposed to be? He risks what would be a huge, career altering, incident which could lead to suspension or general vilification, even aside from the risk of crashing himself, to take out a rider he is not in any kind of direct competition with and has no known beef with? Why exactly?
Even if he was 100% at fault - which we don’t know - it would almost certainly be down to reckless inattention at worst. Riders do on very, very rare occasions deliberately crash someone else but it’s always a result of losing the head in a row or in the heat of immediate competition to win. You would have to be completely broken in the noggin to just randomly try to seriously injure one of the race favourites in from of the world. And Colbrelli does not have any reputation that I’m aware of as a psycho goon.