Actually, I think this kind of attack (9/11) is very old and had died out for a few hundred years. It's reminiscent of medieval wars where an army suddenly attacked a defenseless village, murdered all the males, raped all the women and took the children with them as their slaves right before they burnt the whole darn thing down.
It's a very old style of warfare.. it harks back to more barbaric times.
Which is exactly where these terrorists want to take us.