Talking about racism against white people is rather strange because "white" is a concept specifically invented to oppress people outside of that group, to justify subjugating the "non-whites" in slavery or colonization or imperialism.
If we were to try and define "white culture," we could only define it in terms of racial subjugation. You might say, well, what about European culture and traditions? Yes, there exists European food, European cultural traditions, etc, but that is not the same as "white culture." A French person and a US American have different cultural traditions, different holidays, different language.
To talk about "white culture" means to talk about what unifies them together such that they should be considered part of a common bloc, and the only defining characteristic of "whiteness" that unifies it together is racial subjugation.
Indeed, the same is also true of "black culture." Black culture is almost entirely understood as culture devised as a response to racial subjugation. When people think of black culture, they often think of things like traditions and songs devised in opposition to slavery, or black churches which were their own community centers developed independently of white churches due to racial segregation.
You can argue that bigotry against Europeans exist, but bigotry against "whiteness" makes very little sense, because "whiteness" only exists as a category to justify subjugation, and it is the only thing that ties together "white people."
It is harmful to promote "whiteness" even as a "white person." If you are French and you love your culture, that means you love French culture. If you are from Spain and you love your culture, that means you like Spanish culture. Have you ever met a person who said they love "white culture" that wasn't just a racist PoS? Universally, everyone who promotes the idea that people should be "proud of being white" and talks about the greatness of "white culture" are always just extreme racists.
In my opinion, even "white people" would do themselves better to stop promoting identifying with "white" as an identity group.