You can talk about how the universalist is putting lipstick on a pig, the pig being the infernalist position, which many argue is immoral, cowardly, hateful, and odious, the platform for one of the world’s dominant religions.
You can read Maggie Rowe’s memoir Sin Bravely and agree that she hates those Christians who embrace the hell doctrine and spout about the unconditional love of God.
You can embrace Elizabeth Anderson’s atheism as a moral construct based on centuries of social evolution as discussed in her essay “If God Doesn’t Exist, Is Everything Permitted?”
But you still need to change, to evolve beyond narcissism, self-centeredness, hedonism, relentless carnality, greed, self-glorification, and all forms of idolatry.
Perhaps an atheist like Elizabeth Anderson, or even a progressive Christian, would say bible literalism is a form of idolatry.
In any event, you still need to evolve beyond the foibles and self-destruction of a narcissistic, hedonistic existence and become a moral person. Only moral people have any real sense of self, of a real life lived.
And what about purpose? I suppose one could no longer believe that there is some Ultimate Higher Purpose and still believe in moral character. That is the purpose, having character.
But what if we’re like St. Paul: We try to be moral, but our lower nature dominates us and creeps up on us when we’re unaware, and we’re agonized by a sense of self-loathing and moral failure?
Is not Christianity the answer to such a wretched state? Is this why perhaps the great religions like Christianity will not die?
To conclude, even if we reject some external or institutionalized religion, we need to find a real religion inside our hearts. Perhaps there is External and Internal Religion.