Some years back, I read of the parents of a notorious serial killer who wrote to his victims to offer their condolences. They said that while their son's act had profoundly saddened them that they were unable to deny their love for him. It struck me that that's the true nature of love. Parents who truly love their children will love them unconditionally, whether they become saints or serial killers. I imagined also that the serial killer's parents would see him as sick and not evil.
Then, it occurred to me that if a Loving Creator exists, that we would all be loved unconditionally. So, it doesn't matter what we believe, atheist, agnostic or theist. And, while the acts of the serial killer might well profoundly sadden a Loving Creator, the killer would be seen as sick and not evil.
As for punishment, I can imagine that a Loving Creator might approve of a fair punishment as instruction for misbehavior, but the idea of eternal punishment in Hell for any reason seems absurd, and the idea of Hell as eternal punishment for non-belief is absurdly unjust.
Christians have been told to believe in a god who loves conditionally -- I will love you if you please me. That's not love at all. That's an attempt to use another's need for love to coerce compliance. "If you don't please me I'll withhold my love."
Had we , you and I, been born with the same genes as Hitler, and had we been raised as he was, we might be bully tyrants bent on world domination just as he was. If a Loving Creator exists, I think Hitler was seen as sick not evil, like the rabid dog.