Christianity is a lot simpler than most people make it out to be; indeed, Paul exhorted the Corinthians not to be led away from the simplicity of their devotion to Christ (2 Cor. 11:3- just consider what it means to be simply devoted to Christ).
But what complicates Christianity may come as a surprise; it is not the Bible or sound doctrine that makes Christianity complicated, it is when we strive to live in both sin and righteousness that makes Christianity so complicated. The cross is diametrically opposed to the flesh, but a lot of people are still trying to figure out a way to sneak sin past the cross into the Kingdom of God. That is when people start trying to force terms like “gay Christian” into the scripture, and we just can’t do it.
Christianity is as simple as “pick up your cross and follow Me”.
Trying to obey two separate masters who are opposed to one another is a very complicated mess. If we want to uncomplicate Christianity, then we just need to decide who we are going to follow: God, or the ruler of this world?
This applies to everything that is of this world; materialism, hatred, idolatry, lust, impurity, sorcery, strife, jealousy, anger, disputes, dissensions, greed, envy, drunkenness, carousing, and the like, it is all at enmity with God. We can’t expect to have peace when trying to submit both to God, and that which is at enmity with Him.