I think a good way around this problem is by having some wit.
If confronted by Muslims, ask them if it is true that “If they touch pork, it will burn up their soul like the fires of Hell?” Then pull out a canister of pepper spray, labeled PORK. BACON is also good.
Also, if it is likely that the police will then be summoned, have a second, identical canister with water and a little bacon grease in it to show the police. Offer to let the police test it, if they like.
Suggest to the police that the Muslim is a hysteric, and that water and a little grease never hurt anyone.