What advantages are there with racism being taught today?

I believe that an answer to this would be some advantages with racism being taught today is that we know our places like African Americans stay with African Americans or whites stay with white and that we don't have as many mixed races
I hope this helps some good luck have a nice nite

Tenochtitlán was the capital of the aztec empire. it was a busy and bustling city where“there are daily more than 60,000 souls, buying and selling, and where are found all the kinds of merchandise produced in these countries.” when cortes arrived in 1519, theenormity of the trading market and the smoothness of it’s running both surprised and  impressed him.