Neither do Christians, Muslims, Hindus, Taoists, etc.
Snow, did you see the Quran verses posted earlier? Violent spread of their faith is a precept. The word is called Jihad. I would love to see them interpret it differently, but they view their book as the literal word of Allah, directly spoken by Gabriel the Archangel. The early Muslims obeyed these verses, and spread their faith by the sword. That presents a difference between Islam, and the other religions you mention. Islam is genetically violent. Buddhism, which you mentioned earlier, is not.
By the way, I read somewhere that this Quran burning church in Gainesville is somehow associated with the Westboro Baptist Church people.
BTS