It is certainly not censorship at all. Calling it censorship muddies the waters and plays right into the hands of the people who want to push hate speech.

From Wikipedia:

Censorship is the suppression of speech, public communication, or other information, on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient".[2][3][4] Censorship can be conducted by a government,[5] private institutions, and corporations.

In this case as far as I can tell the server provider (not CF) was repulsed by the site content. I support that choice and the company ability to make it. Still it is censorship.

There is bad censorship and good censorship.