This article is a good exploration of a common difference between the way that movement on racism is seen by blacks (progress expands opportunities for everyone) and by many whites (progress takes away opportunities for them). It may be useful for allies to consciously create stategies for combatting these views.
http://www.cnn.com/2017/08/16/politics/blacks-white-racism-united-states-polls/index.html?sr=fbCNN081617blacks-white-racism-united-states-polls0658PMStory