This modern tendency to purge instead of rebut is very disturbing.
If the man is talking nonsense, it should be easy to refute him. It would also serve as a great "teaching moment" to help everyone sharpen their BS detectors.
It's not easy to refute when there are 10000x as many uneducated people as there are actual scientists who could be trusted to refute it.
This is how online communities work. Small number of moderators fighting off an endless stream of BS.
We can't encourage discussion on life or death matters when they are shared without even citing a single source! There is no debate, just emotional pandering.
If the man is talking nonsense, it should be easy to refute him. It would also serve as a great "teaching moment" to help everyone sharpen their BS detectors.