It doesn't matter if the boy had mental disabilities or not. It's about the message sir. You're basically saying to your underworld colleagues 'I don't care if you're a 13-year-old retard or a middle aged Howard Beach resident with a mustache, I'll destroy you if I have to.' No one is safe. Remember when Nicky Scarfo killed Salvatore Testa? He instilled so much fear into the rank and file that they had no option but to follow that man into hell. That is how you gain power in that life. You make sure they know you are one deadly s.o.b.