I almost started a riot when I posted this pic couple of years ago to one of my Yahoo Groups:
The Muslim guys simply freaked out.
In a way I can understand that, I'm a Christian and you can post 100 funny pics of the Pope or a priest, I don't give a fuck but if somebody gets a hold of a picture of my mum and starts posting a nasty photochopped version all over the Internet I'd freak out too ;)
I guess sometimes it's not so easy to understand people that have different values.