Disclaimer: I have no love whatsoever for China.
That being said, the problem with Trump calling this the China Virus is that it was an attempt to:
1) Deflect responsibility away from himself. 2) Create anger that will obscure the real issues and allow him to otherwise create political capital for himself. I'm sure there's more, but to be clear, it's not an issue of being insensitive.
The problem I have with anyone that raises an argument like yours is that Trump's calling this the China Virus is such a clear obfuscation that I can only assume that by defending him you think I'm an idiot.