This answer was deleted for being spam or rude or abusive.
What specific content was spam or rude or abusive?
My objection: you rather gratuitously dropped "Kung FLu" in there, something that even Trump was skittish to endorse. Yes, you did that under the pretext of showing us the horrible "media bias". O RLY?
As @tim reminded me, the post also contained the questionable phrase "Hollywood elite cabal — which includes many members of the media". Yes there was literally a Hollywood group involved in making that ad (the relevance of which I also didn't quite see in the context of the question), but do you have to use the "cabal" pejorative to describe that group? (How is that different from referring to Trump's supporters as "deplorables"?) A well known actor put his face in that ad, so that doesn't strike me as particularly secretive, which is the literal meaning of "cabal". Furthermore, the whole expression can give the impression you're making a wink-wink anti-Semitic statement by linking the "Hollywood cabal" to "many members of the media". To quote you Wikipedia on this:
One antisemitic cliché is that "the Jews control the media" and Hollywood.
The fact that you chose to do all this in a post about racism and stereotypes is either incredibly insensitive or "rubbing it in your faces".
I should add that someone else (user Kevin) has now posted an answer that is similar in spirit to yours, namely that the US media, supposedly previously impervious to any racism in terms like "Wuhan virus" back in Jan-Feb, is now extremely outraged when Trump uses a similar term. Unlike your answer, Kevin's has overall positive [up]votes, so one can make a claim quite similar to yours (essentially that media bias against Trump is largely responsible for the controversy) without getting into odd turns of the phrase and/or dropping in any unnecessarily controversial "martial arts" terms.
For clarification (given objections below to this addition): I'm not saying that Kevin's answer is necessarily/substantively a good answer. (For example, it did not back up its assertions with any data/links etc.) I'm just saying I personally could not justify flagging Kevin's answer as "rude and abusive", which I've actually had done with Rain Willow's.
I voted to delete this answer as in my opinion it does not answer the question in the post title; "Why is Trump dubbing COVID-19 as the “Chinese virus” considered offensive, while many past epidemics have had similar naming schemes?". Instead it comes across to me as a rant which, although it provides an explanation as to why Trump uses this term, it does not give consideration to why it may be considered offensive.
I did not flag the answer as spam or being rude or abusive, I just don't find it provides an answer to the question.
See the help center on deleting answers that don't answer the question/should be a comment.