You miss the point! There is a huge difference between calling out a small minority of racist white supremacists and a whole white race. The White supremacists are not being called out because they are white but because they discriminate against non whites generally. The only reason white comes into it is because this cohort of racists tend to be white and who believe they more superior to other races or people of differing colour. I am White and I certainly don't feel the calling out of white supremacists impinges on me in any way. In fact I as a white person would also call out that minority of white supremacists that discriminate against ALL people of another race or colour.
If someone wants to discriminate against ALL white people then yes that could be racism. The reality is though that the criticism's are not of ALL white people but rather those that conduct themselves in a harmful way towards anyone of another race/colour..
