@Billyblobber, which colonialism would you like me to study - there have been many empires. Islam predates the european empires but not the Arab empires (Caliphates). The spread of Islam and Arabization went hand in hand.
Your comment regarding Rwanda is something I'd like to pick up on. In blaming colonialism for the Rwandan massacre you're denying the Rwandan people agency. The only people to blame for this were the Rwandans who were macheteing and raping others of a different tribe.
Similarly, with Islamic terrorism, the world-wide muslim community (Ummah) needs to sort itself out. Colonialism, America or Israel can't be blamed for everything.
There are Islamic terror attacks in Thailand. The Indian branch of Al Qaeda has recently urged muslims to kill the idol worshippers (hindus). How do you explain these last two points?