If men were angels we wouldn't have government. Like wise, I doubt the child enthusiast was a great contributing of member of society or someone I would miss if they died.
We shouldn't have street justice, but if that was your kid or my kid getting abused by some greasy piece of stuff, I think both of us would have the urge to brutally destroy that person.
He was abusing this child since he was eight, this man deserves everything that's coming to him.
*cough*