Sure we didn't get to see if they had a good side or not, but what if THEY DIDN'T HAVE A GOOD SIDE.
They SEEMED like complete monsters, so who am I to argue?
and besides, I don't give a fuck if they had sympathetic sides to them, the things I DID see them do were terrible things, and they didn't have any remorse for it, these guys were terrible people, and what? Maybe they had kids that loved them, sure, but that doesn't make what they did forgivable.