Great point! I'm sure Hitler's homosexuality did have a major and negative influence on his life. As did Darwin.
As usuall, there will always be people that say they are Christians who are not. Christ even warned us about them saying they will come to Him crying Lord, Lord, and He will deny knowing them. There are many in pews every Sunday that have no idea they are doomed, but claim Christ. By the same token, there are pagans, communists, and Nazi's who call themselves, progressives, liberals, and Democrats. You will know them by their fruit. A Christian that helps a needy family is not a liberal and a liberal that helps a needy family is not a Christian. God knows their hearts.
There have been more people murdered in the name of God, than for any other reason, when the reality is money, power, and greed. Joshua, David, and Gideon, all killed in the name of God, because He said so. The Anti-Christ will murder in the name of God and the world will once again follow. We must know the Heart of God to know the difference.