Christian sin—living in an undocumented or unorthodox sexual relationship. This is the crux of Christian morality—that the churches are in fact sexual and family regulatory societies. There is no redeeming liturgy or spiritual achievement. You are forever in need of religion because religion never prepares to graduate it’s members.
Doctrinal issues—do you believe the correct supernatural things? Do you believe with the correct level of humility, knowing full well that the two contradict each other, as belief leads to arrogance? To believe the wrong doctrine is a sin worthy of battle. But who gets to decide what is the correct version of the imagined godhead?
Have you made Jesus your personal savior, and if so, is he the only incarnation of the god (or the ground of being) to use a less contaminated term? Are there other teachings that are perhaps more useful?
The failure of Christianity is this; love your neighbor as yourself, when you yourself have no source from which that well can spring. Loving yourself is the requisite. Without that there is nothing to give.
But in Christian circles you are the fallen sinner not worthy of love, granted only by the lords tolerance and mercy. It’s no wonder the church has never produced the desired results—the order of operations is backwards.
The Thirty Years war was over doctrinal disagreement and which belief was the correct belief—which literally means, which doctrine is more sufficient to keep people subservient to societies upper-crust. Millions died in that conflict alone because the premise is false. It will never produce the desired results because you are born insufficient for the kingdom of god.
HERE is a ten second video illustrating the source of morality.