Earlier quoted context omitted.
Only if you believe in evil. I'm not christian so I don't see the world like that. He killed his s/o, like what 15 years ago now? People change and deserves a second chance.
Evil is not a religious concept.
But the idea that "evil" is an attribute a person can possess is 100% a religious one. If you're not religious, there can be no evil person unless you think there is an "evil" gene or an "evil" psychosis - "sociopath" and "psychopath" are often used this way but usually in ways that have very little to do with diagnostic criteria and more with trying to sound more profound than just calling someone a bad person; in pseudoscience this also sometimes manifests as the idea that some people are more predisposed to crime, though usually nowadays this more often manifests as vague notions of "racial culture" than measuring skull shapes, but this too is just a more elaborate way to call groups of people inherently bad.
As a religious concept, "evil" can be somewhat nebulous where people just take some wrong turns and "evilness" seeps into them making them irredeemable: many Christians (especially certain sects of American protestantism) believe "sins" (i.e. disobeying God's rules, not necessarily causing measurable harm to others in secular terms) work kind of like this where habitual sinning in one way can lead to sinning in other ways as sinfulness takes over the person's life (like an addiction spiraling out of control). It can also be a much more literal idea of outright demonic possession (e.g. the kind of thing you need an exorcist to help with) or demonic presence (e.g. evil people actually being lizard people masking themselves as fellow humans to hide among us). And yes, I'm labelling certain fringe conspiracy movements as religious as they operate on a similar framework and often have direct ties to religious traditions and concepts.
Conversely, not only are "evil people" a religious concept but so are "good people". If good is something you do that means you need to continously demonstrate your "goodness" by doing good things. But if good is something you can be then any accusations of wrongdoing are highly suspect because a good person would do no such things. This is why most people don't take kindly to being told even in the most polite terms that something they did was kinda racist (or sexist, or misogynist, or...) because "I'm not a racist" (i.e. thinking of it as an innate attribute of their character rather than one of their actions and hence something they can and need to actively control) - mind you, liberals did not do a good job with this distinction either over the past decade because as it turns out even self-professed non-religious people often have religious upbringings that stick with them (i.e. self-applied labels like "feminist", "anti-racist", etc should only ever be read as statements of intent and dismissed if they do not manifest in their actions which they rarely do).