Dogfighting case closer to sacking Vick

More horrid details about Michael Vick's involvement in the dogfighting case---now his co-defendants finger him as having participated in horrible, brutal executions of supposedly under-performing canines. I guess my question has to do with not only how anyone could facilitate dogfighting; but rather, how anyone could think brutally killing dogs in this way is somehow, in any way, OK? How could someone claim in public to love animals (and Vick has so claimed) and then in private kill these animals, and yet sleep at night? i don't get it.