[Happy Monkey]

It is not a valid comparison. A comparison to your teacher example is Columbine, where a couple of disturbed kids committed a massacre. But, hysterical media reports notwithstanding, it was not a pattern.

If, in the years since Columbine, the number of suicide attacks on schools by children in the US had increased to the level of suicide attacks in Israel, we would be idiots to say "Children these days are evil." instead of trying to rectify the problem in the system.