It strikes me as a little awful to only care about bad people inasmuch as they're likely to become good people. Maybe I've been perverted by my Catholic upbringing, but I was taught to love everyone, including the sinners, including the people you'd never want to hang out with.

I believe you're also supposed to hope/encourage the sinners to repent and stop sinning, i.e., you're supposed to root for them to become better people.