Why do they attack us?

I've always wondered why the terrorists attack us.  It says in The Thousand Year War that the "terrorists" feel like we are attacking them.  So why do they feel threatened? Well, Mr. Maybury says that the crusaders came and attacked the Muslims a really long time ago and the Europeans have fought multiple times with the Muslims and the Americans stumbled into the "wars" a while back.  The Americans and Europeans see every series of battles as a separate war where as the Muslims see it as one big war which is the Europeans vs. the Muslims.  So the true question is not why are they attacking us but why are we still at war with them.

There is some food for thought.