Those Poor "Mixed Up" Monkeys
If you a left wing tree hugging liberal & a member of P.E.T.A. then you "turn the corner" and QUICKLY decide that the chimps must have had a really good reason for attacking the old man.
Maybe the old guy voted for George Bush or he was a registered Republican or maybe he once cut down a tree in his backyard. He might not "Recycle" or he is possibly not a vegetarian. If he eats butchered animals then the animals have every right to rip his face and other things off.
Possible he didn't believe that Greenhouse Gasses were depleting our Ozone layer & destroying the rain forests...in which case he deserves to die at the hands of primates. Maybe his foot got ripped off because he was wearing (Oh My!) LEATHER shoes!
Every effort should be made to save the chimps. They just need counseling from a good, qualified animal psychologist & then need to be returned to their natural habitat but only after they have been medically checked to make sure that they didn't pick up any human diseases from the elderly guy.