Re: What do you do when a student is acting rudely in your class.
You've got a nut-job here and a serious safety issue. Calm discussion and logic does not work with such people. Show him the door post haste and be glad that no one has been hurt already. You and your other instructors are also nuts for putting up with such behavior. You are as much to blame. The nut-job probably can't help being a nut-job, but you and other instructors, I assume, have no excuse. Politness has nothing to do with it.