I see your point but I don't see your point. If you don't believe is sin then I would agree that it's an insult. If you do believe in sin then I can't see how it's an insult. If someone calls you a sinner Ghost just say

"What Bitch and your not!"

That should shut them up. In the Christian belief system everyone sins. So no one has the right to call another a sinner cause in our eyes everyone is a sinner. Christians are some of the worst one cause they hide behind things like "I go to church" "I believe in God" "I don't sin like that" in my opinion Christians are our own worst enemies. We set bad examples for others cause most of the time we are hypocritical.

Rev. Michael T
Soldier for Christ