I think it's fairly safe to assume what would cause offence, yes it's still the choice of the person to take offence but would you give a talk about how the holocaust was a hoax outside a synagogue? Walk around a mosque with dirty shoes on eating a sausage roll? Unless you are either trying to incite hatred or a total moron it's safe to assume the 'hit rate' of offended people in those scenarios would be 100%
Playing killing in the name in a rock bar, far less likely.