Disapproving of someone's choices and actions doesn't mean you don't love them anymore. In fact that's why it hurts more when someone you love does something truly heinous. It's often hard to just suddenly let go when it's your child, sibling, etc.

serial killer, pedophile, or worse, a conservative.

We can still love each and every one of them, and tell them so during visiting hours. Especially the conservative, as I suspect they quickly become some bubba's bitch.