As a reader of Jane Goodall when she was young and studying chimps I learned all this and more. Male chimps will also kill human babies and eat them.
Male chimps are vicious animals and not the cute little critters they show on TV(those are children chimps, not yet adolescents).
My point is why in the world did these "experts on chimps" have the female and baby in the same enclosure as the male chimp? They should have known better.
I agree and would have hated for me and my kids to witness something horrible like that. I know she's just an animal, but I feel sorry for the mama. The zoo people goofed up big time.