Why are so many US conservatives in this day and age still against racial mixing? They won't say it in public, but they are still against the mixing between Blacks and whites? Why?

Read also:

• Why do the Republican city officials at Springfield Ohio continue to deny that immigrants are eating pets to sabotage the Trump campaign, even though immigrant pet-eating is now widely believed to be true?
• How was cancer treatment different in the US and the UK?
• What is the lowest probability event you have personally witnessed?
• Why do I sweat so much at the gym?
• Why would the state lie about the Earth's shape? We know that it's flat, but why do they lie and tell us that it is a sphere?
• I have been married for 34 years, and I found out my wife lied, and cheated a lot back before we got married. Does she not change, or is it possible she is still a cheater?
• Do you consider masturbating to porn cheating if you are married?
• If Jesus was crucified by Governor Pontius Pilate, why does the Quran deny his death?
• Why are flat Earthers made fun of when they seemingly don't exist? I have only met one flat Earther in 18 years.
• Why does everyone hate Anthony Joshua so much? I get that he isn’t the best heavyweight boxer ever but people claim he’s a no skill fighter but he has an Olympic gold medal, a world championship, and beat Klitschko, a dominant force in boxing
• What are some effective ways to cope with loss and grief?
• Pokémon GO Hyper Training Guide: Max IVs with Gold Bottle Caps from the Ancients Recovered Event - Pokémon GO Hub
• Why is there no evidence of a multiverse theory?
• Why are Republicans so brainwashed and oblivious to the fact that a lot of the price increases going on right now is due to corporate greed, not inflation?