My dude, you are getting baited by the people you're decrying. This policy is affirmative action to help get minority groups who otherwise might not go in to see the exhibit. It's attempting to address structural issues by carving out a safe space for the victims of colonialism. It IS a form of discrimination, as is affirmative action in general, but the purpose and intent is positive. It is neither segregation nor racism.
If you don't believe me, I'd urge you to consider who ran this news piece, and what their motivations might have been. When you call this racism, you yourself are siding with racists.