If it isn't meant to tap into some kind of prejudice against Chinese people, then what is the purpose of spreading false rumors like that?
You can of course be against the Chinese government. But when you start fearmongering that a public American company is "actually Chinese", "more than commonly discussed"... based on zero evidence except that the company has a lot of Chinese people... then if it's not meant to trigger veiled racism, what is it meant to trigger otherwise?
Since, again, Zoom is not part of and has nothing to do with the Chinese government, except for when it obeys the government in its operations within China, like every other American company has to do too.