You've made some incorrect assumptions here so allow me to clear those up: I have never been in denial about racism and the whole "white denial" thing is foreign to me.
I can't and won't attempt to speak for other white people, but I noticed them at every rally or march after George Floyd's death.
Racists may be clinging to their myth of white supremacy, but nobody I know falls into that category.
My people have always believed that white supremacy is a nonsensical construct designed to justify slavery. This is something I've known all my life. It is not a new thing.
I am getting a little annoyed with constant assumptions by Black people that White people are all the same.
The problem with lumping people together, based solely on their race, is that, well, it's racist.