I beg to differ on a few different points :

Firstly, modern racism is IMO not ethnical, but cultural. ie. it's not aimed toward a specific race/skin color, but toward a specific culture.
Does it make it any less stupid ? No, but nonetheless, I don't think racism can be summarized as "I hate these guy 'cause he has green eyes".

Secondly, sure, none should impose its value to a child, at least till he can make a rational choice. Thing is, IMO, 80% of the population is simply not capable to make such a choice (that is, considering that rational choice even exist). That's why propaganda and endoctrinment won't disapear anytime in a near future.
Even if it was possible to educate the population (which would be contrary to the elite's interests), I think most people wouldn't care. Being educated and enlightened requires a lot of work and time, and is in a way, exhausting.