The worst part of these accusations is that your reputation is tarnished whether you are guilty or not. This instilled a sense of fear in every person even if they are innocent because you can still be targeted and your career ruined. If this scientist was just stating out, rather than already established, he would likely have had to quit science. There should be some penalty for false accusations that can compensate…
I accept the US is having a power struggle with China at the moment, but this is not the way to win it. People who aren't actually in favor of freedom will welcome this "record who associates with China" thing, but it goes against the high ideals of the US and makes it look like many unsavory countries.