After many years thinking about this issue, today, I think what happens is that many people are truly xenophobic, but at the same time they are ashamed of it, and think that others are the same as them.
Hence, it is these types of people who often try to "combat racism" in others, rather than in themselves, and support critical race theory, because they believe that everyone is racist.
And they want the government to fix it, because they can't change the disgust that people of another race give them.