Early virtue signaling, and one-sided. Plenty of “carefully taught” non-Caucasians don’t want their children to marry out either.
The idea is nice, but in practicality doesn’t always work. For me it’s not the race, it’s the culture. If we all can have the same good and decent Christian culture, then fine!
As far as being taught? My parents did not teach me anything prejudiced. The demographic did. No one better blame my folks for me being bitter.