That's a Smithsonian museum, not some abode of radical leftism. That display from 2020 has been removed, and it any case it was listing aspects & assumptions of white culture in the US, not necessarily saying they are wrong. Through your ideological lens, you're predisposed to see everything in that list as something "the radical left" (or blacks, whatever) considers evil, but that's incorrect.

If anything, this display erred on the side of attributing too much to "white culture" which isn't a fair assessment of the contributions of other cultures. E.g. scientific thought, rationality, politeness, self-reliance are all good traits attributed exclusively to white culture, which is questionable.

The display didn't state these were things to dismantle; that's just your right-wing mindset assuming things. You're echoing the talking points of MAGA at this point...