Spindok, it happened in UK. It is insane there. I think you have no idea how insane, so you are missing a part of the context. Yes, the teacher was apparently not up to job. But every single tool that he may have used to get things into a manageable situation has been removed from his arsenal. It is wonder that there is not more teachers snapping into a rage bundle.

For instance, in UK, you have no right to defend yourself from a criminal. If you do, you may end up in prison, while the criminal may sue you for any physical harm and mental anguish, beside being free to mug someone else. So, not only you find yourself in prison, you end up financially supporting the bastard.

That insane.