Systemic racism in the US: Why is it happening and what can be done? So since no one wants to say the obvious.
It's the nature of the human animal. The human condition. Everyone. everyone. is biologically predisposed to favor similarity and familiarity over anything else. Google "babies are racist". Something is familiar or comfortable it's likely to be safer. Otherwise, it may not be. Example, living in a grassy plain for hundreds of generations. You know it's safe, you travel far enough to see the terrain change, some will instinctively stick to what they know, some will venture outward. Perhaps beyond that plain lies danger and those inclined to venture never make it back. So, those who instinctively stick to what they know, live, survive, and reproduce. Just biology.
When you have an open society with no religious mandate in education or morality, as such defines "freedom" apparently.. you're subject to society and biology. Which if you Google'd what I mentioned, would not be unexpected. Aside from that the media, not news media but movies, TV, and music. People don't like watching happy and fulfilling things when theres more emotionally thrilling options. They find it boring and dull. When I was growing up kids didn't want to play crash bandicoot they wanted to play grand theft auto. If you didn't play it and couldn't relate to what they were talking about you were an outsider to the group. A lame-o. Many don't outgrow this mindset even in old age.
That's the why. As for the solution. Well. State churches were abolished. One pivotal one has just been burned. Otherwise. Good luck.
If you're truly concerned about the why and the solution. You have to look in other countries were whites are the minority and non-whites are the majority. Are things any different? They might be. If they're a statistical minority yet remain an influential functional majority. If so obviously the concept is not effectively present.