The promise of a bacon bit into each muzzie corpse. That way they'll know they're gonna meet mo in hell.
I'm not so sure, I think he may have been following the devil. If you remember, the devil tried to turn Jesus, and failed, but what if he succeeded with Mohammad?
There is a referance in the quran referred to as the "satanic verses" (which is where Salaman Rushdie got the name from for his book). Its a section where Mohammad is "tricked" by the devil.
There are also concerns from himself about the devil.
I think he was fooled and possessed, and thats why this death cult is around today.