White people can still be plenty racist without being in blackface.
All you do when you call full costumed makeup blackface is minimalize actual blackface.
This is blackface:
What is she supposed to be? Anyone in particular?
No... just '
black' as a whole. An entire race minimalized and mocked, stereotypically.
This on the other hand is white privillage spilling over into poor decesion making, not blackface:
Using make up to try and portray a specific person (Kanye West) that is the color of the makeup. He also has makeup for Kanye's beard, indicating a detail to the specific costume for an entire look not to become generically black to mock a race of people.
Very bad decesion, and he might indeed be racist as well... but the costume itself is not racist.
There is nothing inherently wrong or mocking in being brown-skinned or in being Kanye West. Thats my take, anyway.