Well, the Bloomington incident did occur in the kitchen the most likely place for a non-arson fire to break out. But the presence of the burned Koran outside makes it look more suspicious as a potential "hate" crime.
I wouldn't put it past Muslims to stage fake attacks on mosques to further split muslim communities in the West from the non-muslim majority. It's one of their stated goals.
How can you tell if a Muslim is lying? If he see his lips move.
This article was published today. It brings you up to date on the presence of an AlQaida recruiter in Bloomington in 2001. http://www.wthr.com/Global/story.asp?S=1285160&nav=DqSHFuPg