Constantine = Roman Catholicism. Christianity was turned from a problem for the Romans into their tool. They brought everyone under Rome by integrating Pagan attributes into their perversion of Christianity so their 'usual customers' i.e. pagan Romans wouldn't feel alienated.
Roman Catholicism =/= Christianity.
As for King James, that's simply a lie. Try proving it. The guy was married with kids and wrote against sexual perversions. These are all the same desperate lies I hear anytime someone is simply being stubborn and doesn't want to accept the truth.