Board Thread:False Info and Speculative Discussion/@comment-13965604-20140715134406/@comment-4091815-20140716221534

Your fan fiction aside (seriously watch it with the detailed scenarios) Gerard's acts are responsible for his condition.

Scott took a defensive move to avoid Gerard becoming an Alpha and killing Derek. If Gerard had stopped being evil for a minute - he would be fine (dying of cancer, but otherwise unharmed).

Scott tried other means to avoid Gerard getting the chance to force the bite. When all other efforts by all the other players failed - Scott's plan was all that remained to stop the greater evil of Gerard as werewolf.

He didn't set out to hurt or kill Gerard - he set out to stop him from becoming an Alpha.