As a rule I will not capitalize islam, koran, mohammad or anything else related to that cult of death.
What rule is this? Ridiculous. Capitalizing proper nouns has nothing to do with respect. It is about adhering to the established rules of written English language.
Don't like Islam? That's fine, but refusing to capitalize proper nouns is no less ignorant than trying to argue that 2+2=5 because you don't like 4.