Could terrorists, of any political/religious persuasion mount an effective attack on a school? Of course. Just look what a couple of D- teen age slackers did at Columbine. They had no real training, improvised munitions and
firearms of only average performance compared to full autos. If a couple of well trained, well funded people chose to attempt a similar attack the outcome could be far far more horrific. Why hasn't it happened? Haven't a clue.
Those who say it won't because it wouldn't serve the purposes of "the terrorists" and would risk "making us angry" have it wrong. We are faced with a multitude of terrorist factions, most loosely allied,at best, under the idealogy of Islam. Many have conflicting agendas and conflicting goals. Many
simply do not care if an attack of this nature is not strategically wise. Their idea of strategy at times is very basic. Kill. The more the better. Strike fear into the enemy. What better way than to make us fear for our kids.
I have two teen age daughters in school. I worry everyday about this even though I know, logically that the odds of them being harmed at school by terrorists are theoretically millions to one. Parents worry about everything, even the nearly impossible. The tactical value of such an act is miniscule but the emotional toll it would take would be tremendous.
As for worrying about
"making America angry"...I doubt that they care one way or the other. Most terrorists are happy to die in this fight and they care nothing if a million of their innocent countrymen die from our response to their actions. So barring
us using our "nuclear deterrent" to glass over most of the Islamic world I don't think they fear us any more than they fear their neighbors of a different
sect or tribe.
A terrorist attack on a school is of no more strategic value than a terrorist attack on trains, subways or public buses. Ask Spain et.al. what they think about the subject.