Destroying the towers was outrageous -- but it was not in any sense immoral. That judgment would be pointless.
I vaguely remember an interesting article by Lenin insisting that one could be passionate in one's support or opposition without taking a moralistic stand. I'll have to look it up. Carrol
mbs: If so, then why should one support w.c. revolution, or not support its opposite?
Also please explain what "outrageous" means in your context, if not immoral.