I can see why people would be OK with the beating death of a man who was caught in the act of trying to molest a 4-year-old girl. I think everyone agrees that child molesters are the worst kind of people. We can debate whether the father deserves a jail sentence for the act, and/or whether its circumstances truly constitute self-defense. That's all fair and good.
But when you start cheering for the man to earn Father of the Year awards, I think that's going too far. Something like this should be seen as a regretful situation. The father himself said he is "very remorseful" that the man died. While the father prevented one terrible thing from happening, another happened in its place. Death and violence, even when involving a true heel, carries emotional baggage of its own, especially if the little girl witnessed the fight. Whether it's the girl, the father, the family or all of the above, someone will carry a heavy toll over the outcome of this. The dad definitely will, even if he has no regrets.
Self- or parental defense, like war, are things that should be given the weight they deserve. They should always be a last resort and never the subject of fist-pumping. As disturbing as the incident was, it's also disturbing to see people want to put this father on a pedestal. He doesn't want to be there; he did what his instincts told him to do. We can argue the ethics of that, but stop with the bloodlust. Please.