It's like she said, "Anyone who can love can be redeemed." He showed us that given the right people and circumstances in his life he was willing to try to change. That's with 1000 years of bad behavior to make up for. And that's before we even get to the part where guys always underestimate a fangirl's ability and willingness to see through all sorts of emotional trauma and psychotic behavior. Eventually it even becomes endearing in some cases.
"I hate the word Homophobia. It's not a Phobia. You're not scared. You're an Asshole." - Morgan Freeman (ok apparently this isn't an actual quote from Morgan Freeman... still a good quote though, whoever the REAL original source is!