I clicked on his COVID-19 video[1] on a whim and while I have not watched it yet, my god is the comment section alarming. Is the YouTube comment section always like this when it comes to this topic?
Yes that seems to be typical. YouTube comment sections tend to be of poorer quality when the topic is popular or if the channel has a large enough audience.
Yes. Youtube comment sections are among the lowest quality information sources available on the Internet.