Very sensible - but they had our oil.A bit late now but a sensible way of preventing most of these attacks would have been to not invade and bomb the sheite out of half the middle east.
It didn't take millions - twenty would have been enough.But seeing as we did invade and are bombing the sheite out of them another sensible precaution would be to not let their refugees in by the millions.
I felt the same about the Irish when they were kicking up - but I realised you can't lock up or chuck out all of them.