interesting thoughts from a bad social faux pas

I was at a social event of about fifty people of all types of back grounds. One person came up to me and accused me of being demonic, This is nothing new for me to hear but never has a person been so bold to me while in a social setting. At first I chose to ignore it, but something in me just wont let this go. I know in some circles giving it this much time and thought is giving it power, butI need to figure this out. You see, I used to belong to this kind of thought process, My mother was a zealot for christ in the later years of her life. I got tired of feeling isolated from hating everyone who wasnt a Christian and was really angry with the fellow followers I had to get out. So you see I have been literally on both sides of this coin. Today I feel like a pitt bull in a fight to the death. Why do people fear things they know nothing about and yet refuse to learn? How can someone hold an opinion of something they know nothing about? Why is it when I am confronted with such things I become infuriated beyond belief? Why cant I think of a quick quip to close the mouth and open the mind of the offender? I think that is what has my mind in this vice grip the hardest. I couldnt help this person out of the opinion of me that was unfairly placed. I disagreed with the opinion but I couldnt refute it in a logical manor. Instead I attacked the person for the obvious anti social behavior. That in and of itself was not very social Im afraid. if in a social setting with many friends and loved ones and someone out of the blue corners you and offends you by insulting your religion, what would you do?