I'm a teacher, and I have worked with some totally awful people, and most of them have been other teachers,....

It's the derogatory and inflammatory statement above re teachers that has angered Turnoi, I think. Said statement means that most of the totally awful people the original poster has worked with have been other teachers. The statement does not cast a good light on teachers as employees in general, does it?
I'm not surprised that Turnoi has given tit for tat in the circumstances! I don't thimk he deserves to be cricized for having done so, nor do I think the original poster is a teacher. What he had initially posted would be more likely to come from a disgruntled DOSer than an ordinary teacher!