Marshall favored affirmative action—which made him the enemy of white people:
“I agree with the judgment of the Court only insofar as it permits a university to consider the race of an applicant in making admissions decisions”
https://www.newyorker.com/news/news-desk/thurgood-marshall-and-the-need-for-affirmative-action
Racism is racism—no matter who the victims are.
He was a liberal, which makes him stupid, but not evil.