The throwing and smashing of the baby doll is disturbing.............
Seriously? Really? That was the best part of the trailer, parodying the opening of Stanley Kubrick's 2001: A Space Odyssey.
After encountering the Monolith, apes discover tools and violence:
https://www.youtube.com/watch?v=RWCvMwivrDk
The little girls are the apes, and the Barbie is the Monolith.