Because it massively generalises a very large and heterogeneous group of people based on their skin colour. In all other circumstances, this is known as racism by the progressive left, yet when directed at those who are white it is not. There is a huge disparity between countries of a majority white population in terms of socio-economics, democracy, freedom, 'privilege'. You are generalising across all these groups without any real facts or evidence that what you are saying applies to them all.
It is like me concluding that all blacks commit crimes based solely on the actions of some and then applying that 'fact' as widely as possible. Interestingly, if I sought to make that conclusion, I would be accused of racism.
You do not combat racism and discrimination through racism and discrimination. You combat it through acceptance, openness, and tolerance. So many fourth-wave feminists and 'social justice warriors' (I dislike the term but it makes it clear who I am referring to) are among the most authoritarian people I have ever had the displeasure of coming into contact with. What made it even more ironic is that they are mostly white and from very well off, established backgrounds, yet have the nerve to tell me I, as someone from a very poor working class background, is privileged. Quite honestly, you can go **** yourself.