David Aaronovitch reminds us of some chronology, and then writes:
What does all this tell us? First, that if they aren't blowing us up, then they'll be blowing up someone else. And you don't get to choose who. Secondly, who or what they blow up is largely a matter of what's available. Jews anywhere, Americans after that, Shia next and Brits probably a distant fourth. Africans for fun.