At this stage, I fail to see how you could classify that as overreacting.
He has demonstrated a very clear and profound lack of intellect and simple judgment/common sense.
Why would you give this player any level of responsibility, i.e. competing for the starting position? How could you trust that a person this immature and unintelligent would be worth giving the responsibilty of increased workload much less being the starter?
This is going to be a team that is built around the running game. Bringing a player like this into a key role is like entrusting the QB spot to someone like Quincy Carter. You just do not do it.