Muslims know that there is but one true religion. Well OK the catholics, protestants (especially southern baptists) , hassidic jews, budhists, and moonies are all equally certain of the inerrancy of their faith. Muslims seem to be particular sensitive about anything counter to their belief system. It's like they all have terminal migraines or something. Oh alright, they are not all as uptight as the militant Islamic types but the crazies more than make up for the rational ones..
As for the toilet tissue issue, I like the idea but the really seriously fucked up muslims do not bother to use toilet paper. If they did it could be applied only by the left hand according to allahs command. For real, the right hand is not permitted for use in such an application. There is also a proscribed right and left hand ritual for washing ones hands in case that event is ever contemplated. I'll suspect that kneeling for prayer behind other observant muslims could be a rather odoriferous event.