I'm assuming a lot of people would disagree with me on this. I'm a fan of eugenics. Not of outright killing people but of allowing people to make bad choices that affect reproduction rates. I'm limited by what God allows, which for frum people is nothing. But if in the long-term it will reduce such occurrences. I see that as a positive. This opinion (not exactly the same but similar concept) is in other areas too (i.e. shidduchim)
If it was a close relative and I truly cared about the person my actions wouldn't necessarily reflect this. I don't see that as a contradiction.