I agree with your tagline and I also agree with you about killing this guy... does this make us both hypocrites?
Hypocrites? Not at all. God gave a long list of punishments for people who commit crimes. In this case he would die for his crime. Jesus warned anyone about hurting children too.
I don't feel like a hypocrite. In fact, I'd gladly pull the trigger on this guy. OK, I guess I'm just a meanie. LOL! I think the magnitude of this crime plus the fact that he previously beat his 2 year old, really tells us what needs to be done to this animal.