Why might some of Washington’s supporters say that DuBois didn’t understand What life was like in the South?

Yes,  I think DuBois was clueless

Explanation:

Yes, I think DuBois was clueless about what was happening in the South because he was a political thinker who is unaware from the situation of the African American passing through in the white American society. He encourage people to go aggressive against white people when they act badly. This is easy to say to be aggressive but very risky and dangerous by doing such type of actions in the society where the population of white American is higher..

what are the others?

answer; i believe that the correct answer is,lies(political rhetoric);