That's normal. "The Left" also lump everyone from the National Review to literal, actual Adolf Hitler as "fascists". It's just perspective. The closer you are to something the more what others perceive as incomprehensible arcane details, you perceive as substantial differences.
Anyway, what reasons other than power posturing against whitey was what Yale did? Yale already offers dozens of undergrad art history courses on non-Western canon, including courses like Chinese Painting in the 17th Century, South Korean Urbanism, Islamic Poetry, Pre-Columbian Architecture or Art and Ritual in Tribal India. They're making it sound like Yale was withholding the very information that anything other than New England and Ancient Greece & Rome exists from the poor, unwitting students.
But in reality all that happened was that the figurative blue pixie cuts got their panties in a bunch over the fact that the generically called art history course in a Western university covers *gasp* Western art. Now the students can take one woke shallow course instead of the pre-existing several in-depths courses. Curriculum decolonized, progress progressed!