Vulcan@
Why should religions promote violence? Good question. Why? If they were following the Bible they wouldn't. Jesus said that "by their fruits you will know they are my disciples". Jesus did not advocate violence. Remember when he was being arrested and his disciple cut off the ear of one of the soldiers. Jesus said that he who uses the sword will die by the sword - meaning that there should be no violence among his followers.
I can understand why many are put of religion because of the violence they advocate - for example, Ireland, Rwanda, Serbia etc, all through religious intolerance.