Why do you say they were wrongly suspended? They were clearly in no danger from the man and could have just gone around him. And they failed to assist a citizen in serious distress, unconscious and bleeding from his head. A situation they caused, as it happens. The latter at least would seem to be a breach of their responsibilities as police officers.
The police were trying to clear the area. The man is slapping something against the policeman's arm while walking backwards (didn't know you could touch a cop without consequence)...cop gives a slight push...man loses his balance and falls backwards and hits his head. Where is the story? Suspension...these guys are putting their life on the line trying to enforce order. You have no idea who is in the crowd.
I don't see where any suspension was warranted. You go out there and want to protest...fine, You could get caught up in a situation you may not have thought of...especially when you lay a hand on an officer. Very clear to me.