An Assault on Western (white-Christian) Culture, based on hateful notions that  Western Culture is morally inferior is a form of racism. All forms of racism are evil. It stereotypes a whole race and prejudices (unjustly) the mind against a race of people, who have no moral responsibility for the wrongs committed by ancestors. Incidentally as far as injustices and slavery are concerned you will find that all races, particularly peoples of Sub-Sahara Africa, have long and horrific histories of slavery. Not to mention what Muslim Blacks throughout Africa have done with respects to the enslavement of Europeans and Africans and others. 

If these injustices exist within America's Criminal Justice system, exist, then they have to be dealt with directly. And it is the legal and democratic systems, which are  a product of white culture,that allows these issues to be rectified. Racism against whites does not solve anything. 
Absent white culture there would be no such thing as rights.