Fixed that for you. That so-called teacher sounds a real piece of work, and needs some serious attitude adjustment.
Why does the answer have to be violence?
My point is that many within the system may also be in fear of the system. That's the problem with 'liberals' - they're really quite savage when you're off-message. At that point, your total character assassination and destruction is entirely justified.
So, you're 30 years into your job, hanging on like grim death for the pension, and because you make one utterance (not necessarily anything bad, just something which doesn't fit the dogma) you lose everything.
It is rule by fear.
I can also see a flip side to this: that we end up breeding a generation of kids who are so cynical that there's a huge backlash.
One could argue that that's already starting - look at the rise of the Right on mainland Europe. It's not something I condone or support but again those on the Left should be careful about what they provoke.