Ultimately, it's all about context and how it's being used. There is a long history of the 1918 flu pandemic being named the Spanish Influenza despite not originating in Spain and the impact that it had on how other European citizens viewed Spain at the time. Other European countries censored coverage of the pandemic, but Spain didn't- ultimately the other European countries jumped at the chance to blame it on them.
The intent behind calling it Kung Flu or Chinese Virus was pretty clear, particularly when you consider the source and the fact that everyone knows what you're talking about if you say Covid-19 or coronavirus but you're choosing to call it the Chinese Virus instead (
see photo)- the added specificity is purely to rile people up against a rival country.
I would also draw a distinction between naming something after where it originated and naming something after an ethnicity. I don't really have a problem with the Wuhan Virus, tbh, particularly as it seems to be proven that it originated there one way or another. But I do have a problem with the Chinese Virus or Kung Flu. For example, we call it Lyme Disease because it originated in Lyme, Connecticut. I would have a much bigger issue if it were referred to as the American Disease.