There are very few things in this world that I would be willing to break a law for. Very few. And for those same things are about the only things that I'd get really pissed for. But I would happily flay, pull finger nails, slice open and pour hot coals into the scrotum sac and seal it up anyone that beat, raped and killed children. I would happily take any rap that I got for doing so.
So when it comes to the UN and Mexico on this subject they can just lick my butthole and stuff a hot poker up their butts for all I care on their rules for this subject. This ahole was an illegal in our country from what I understand. If Mexico didn't want them getting executed for these crimes then they should have kept them on their side of the border so that they wouldn't commit these crimes over here.
And yes I would be willing to go to war to defend my country if anyone wants to make that big a deal about it.
And yes I would expect any country that caught these types of people to do the same thing. IMO perferably worse than a simple painless leathal injection.