and the answer to that is theology.
dar ul Islam is 57 OIC countries with the ambition to dominate the globe.
dar ul Harb is the land of war, where non-muslim pigs and dogs must convert or be killed.
those are the only 2 places in Islam.
911 was not the "big" attack, it was the "awakening." in a 7 phase plan that will have confrontation on American soil 2010+. probably dirty bombs in a dozen cities, then a follow up with suicide bombers in hospitals and shelters.
right now the enemy is infiltrating our infrastructure. water supplies, government jobs, military, public works, schools, universities, other strategic places that will make the transition and take over smooth. even the media of al Jazeera English is ready and recruiting sympathetic Americans to be broadcasters.
about the polarity of mindset:
funny about the stories in Al Jazeera Arabic and Al Jazeera English about the VT deaths. Arabic said many Americans were killed, praise Allah while English reported the number of deaths. that's not the only example. the Arab media blasts the US even with childrens shows about becoming suicide bombers and killing Jews and the infidel.