Terry Jones (more about his plan here) thinks Islam is of the devil. He’s not the first Christian to make that mistake, and he won’t be the last.
Once you’ve come to the conclusion that someone, or some group, is of the devil, you are permitted– even enjoined– to obliterate it. The Qu’ran is his Salem witch: burn it at the stake. Such an enraged response to a perceived threat is, ironically, just what the devil wants: chaos, destruction, the unleashed death-force. Yes, evil exists. Unfortunately, Terry Jones is unable to identify the real Enemy, which leaves him vulnerable. The devil is, among other things, a master of disguise.