There was a lot of debate about 10 years ago or so when Jerry Springer the Opera appeared. A lot of Christians found it very offensive (though I doubt many of them actually went to see it) and as a result protested, wrote angry letters etc.
I can’t help but feel this is the same, if your going to follow a religion you need to accept that other people will ridicule you and your faith and that you do not have the right to not be offended.
That said, a bit of restraint and respect from everyone wouldn’t go a miss. It’s bit chicken and egg at the moment. People get annoyed at Muslim protests so print offensive images which annoys Muslims who protest which annoys people who print offensive images…etc