If you ever see little kids with different skin tones playing together, they are clearly not bothered by skin color, and it has no bearing on their play. The racism in America is completely learned. It is not natural. Sometimes consciously, but many times unconsciously.

Loosely similar is how men in most places are fine walking around alone at night. While women consciously try to move in groups, even during the daytime. Many men have no idea how different it is for many women.