I’m not sure what you say is accurate. Did you read the second paragraph. They seem to be okay with using that same verb with regards to, “Nazi punks.” So if the word you are talking about is allowed elsewhere, you can hardly contend that’s the reason it’s being removed.
But, if the poster had written "Obama is the worst POTUS - Ever!"; the Professor would have been unable to do anything - except cry and stomp his feet. By using the F-bomb, you gave him the weapon he needed to remove the term.