The sick ones are those who kill innocent people.
Not only arabs kill innocent people.
US americans did kill or helped kill millions of innocent people, too: Vietnam, Laos, Korea, Cambodia, Indonesia, Guatemala, Chile, Nicaragua, Iraq, Iran, Yugoslavia,...
US americans kill innocent US americans, too: JFK, his brother, Martin Luther King, Cointel Pro, MKUltra, Waco,...plus the young men drafted against their will to Vietnam who died in scores just to make crazy warmongers and military industry stockholders happier and richer...and the so many victims of the Gulf War syndrome!
Independant people did investigate JFK's assassination, many are now investigating 9-11:
http://www.whatreallyhappened.com/quickindex/
Bush lied about Iraq and you accuse those whose investigations prove he lied about 9-11 too of being nuts? Try and be logic for a while!