I don't know if it's been mentioned, but one thing is for sure, the jihadis are watching and learning from the Sandy Hook tragedy.
5.56mm
Beslan
Every enemy of america is watching for our vulnerbilities.....
Although they would be willing to attack a school, the jihadists know the blowback would be incredibly lopsided....
They choose their targets more carefully to illicit a particular response from us....
Don’t think about war with them as a true “war”, think of it in the terms of a political movement with militant anarchist members.....
This is why they haven’t attacked a school, it’s not rocket science for them....
Worth repeating,
Unfortunately our government is not.
They are most definitely watching and learning from this. In terms of cost-effectiveness this type of attack is really up there. Quite cheap (all one needs is several people with Kalashnikovs), and the target type is quite soft. Furthermore, in terms of impact to nationwide psyche and morale, the effects would be prodigious.
They would also have learned a lot from the Beslan school hostage crisis in Russia, where several dozen Jihadi took over a thousand people hostage (including almost 800 children). The terrorists were heavily armed, including with explosives.