To understand how non-christians often see Christians, I once read a website report on the Jesus film project from the 70's that condemned the film for it's use of violence (such as jesus being whipped and nailed to the cross) and for demon possession (saying that having such a scene was "offensive to God") and for, what I believe was delicately handled, Nudity (the demon posessed man... The man Posessed by "Legion")
I look at things like that, and it makes me so sad... To see how people waste their time and damage their testimony by mocking something that I believe God REQUIERD to be done... To get the message out in a way that people could receive it. They said that the message was no excuse for the violence, nudity, and portrayal of Demon posession...
One thing looking at people like this does is show me what I'll be up against... And for people like that who "Revile you, and persecute you, and say all manner of things against you falsely" the Bible says we're supposed to pray for them to be blessed... I'm going to have to pray a lot for people like this, but my logical side (adjusted of course for my beliefs) knows that they're going to be held accountable for that... The most important thing is that I learn from that, I suppose, and repent for my own similar sins...