I think it’s not so much about these people. They are the precedent. For future arrests and court cases involving antifa, it’s important for the prosecutor that these guys are put away as antifa. Antifa has a new meaning now, a bit closer to terrorism.
Also, coming as a group, with guns, one person hiding in a bush with an automatic rifle and actually firing, at a cop. In a country that is known for fucked up accomplice liability laws. Not very smart.