It is a major fallacy to say that if everyone was Christian that there would be no more violence among families and neighbors. Just look at the Puritans who committed the Salem witch trials. They were all Christians living in a Christian society with Christian laws and look what happened to them. Their fear of Satan and God's wrath got the best of them and they turned against one another and they committed horrendous attrocities in the name of Christ just like the Catholics did during their Inquisitions.