The first point doesn't explain any causes of harm and their mechanism.
The second identifies an alleged harm - that race is fundamental to identity - but does not explain why being told that if you're white you do have an inherent benefit you cannot control
causes someone to believe that race is fundamental to identity, nor does it identify what harm that might cause.
Meanwhile, "I can't say if the current trends in white nationalism are linked to this, but they could be" belongs in a dumpster fire on a sinking ship. You're trying to suggest that people became racist only after they were told about how racism harms minorities and helps whites? We can't talk about racism or its effects, because a white person might become racist? Please.
Third, no. That makes no sense and isn't what it says. Saying that white people have benefits does not mean that white people are evil. It's strange. You identified some of what CRT, but when you were asked about how it could cause "great harm", you started lying about it.
Why is it so hard to admit that the racist structure of this country over the centuries produced a system still more beneficial to white people than minorities? Slavery. Reconstruction end-runs around the end of slavery. Segregation. These have lasting effects. If you shuttle people into the worst area of your city and give it the least attention, that area is going to be shit for a
very long time. There are too many examples to list.
I'm white. I benefit. I don't feel that is some kind of indictment of my character. That doesn't take anything away from my achievements. It's true. And if someone else decides the fact that they were help somehow undercuts their achievements and gets chagrined when a black person does better than them, that doesn't mean CRT is bad. That means that their brand of racism is why CRT exists in the first place....what lead to it.