The only way to make people who are not us, not resent us, is by physical separation. This is a hate fact, I know, and I am sorry.
Except perhaps certain groups who have a track record of performing well in our system. Actually, some groups perform too well, and that can result in resentment also. For example, I have resentment for the fact that so many Jews have gotten away with genocidal, anti-white speech and suffered utterly no consequences in our society for so long. Example: Harvard's Noel Ignatiev (recently croaked, rest in hell).
The only solution is walled states / provinces and carving out territory to separate - perhaps leaving those areas which desire to remain mixed. They're coming for you, white man. Get with the program. How many more videos do you need to see of white statues being toppled or white men / women / children / pets being mutilated or beaten?
It’s obvious that we aren’t all getting along. We don’t trust each-other enough. Multiculturalism is doomed to fail unless there is a persistent, dominant over-culture that everyone must conform to. The solution is freedom - allow those who want to self-segregate to do so. This could be accomplished by a large program designed to organize and financially incentivize property exchanges between two source-territories.
Understand that the reason for this "racial conflict" is that lesser people are easily manipulated into doing bad things. It's not because of their race, it's because they are inferior as individuals. Every race has it within them to be strong and superior. The solution is to close the borders and build a unified society.