Hopefully, they and their descendants will be motivated to expand their awareness much faster.

They were not persuaded to be prejudiced against "people like you" because it was good for their kids. 

That's not actually what's good for their kids.

They were persuaded to act prejudiced because that's what their society told them would keep them in a more privileged and safe position and that it would allow them to have more power.

Supposedly.

Petty and sad.

Better to acknowledge that you know the world is full of people who need and deserve better.