"Since suicide terrorism is mainly a response to foreign occupation and not Islamic fundamentalism, "
I don't think this is true at all.
When Bin Laden and his crew started threatening America in the 90s, his reason was specific...he wanted Americans to stop 'occupying' Saudi soil. Well, we got off Saudi soil and yet he still attacked us on 9/11. Occupation is just the convenient excuse du jour. Yes, our presence in Iraq is helping them recruit more terrorists, but the terrorist leaders are motivated purely by Islamic fundamentalism.