Why?
The same reason they attacked us on 9/11.
The same reason they attack (or try to) countries that wanted nothing to do with iraq.
They want a fight, because its the only chance they have of winning, although because of their stupidity, they fail to realise that in reality they have no chance.
No chance? LOL, looks to me like they are winning and winning big. Also looks to me like the West no longer has the will to fight to win. Cruse missles do not win wars B52's, heavy artillery and lot's of boots on the ground win wars.