I'm not an expert on this field, but I do know how to run the incidence numbers of cancer. One of his claims in the article is that for certain types of head-and-neck cancer, incidence rates are increasing. I cannot find any evidence for this:

I took the numbers from the country I'm familiar with (The Netherlands, which has excellent cell phone penetration), and no matter how I look, if I correct for age, they've only been decreasing. The Dutch registry is also one of the most complete of all European countries.

See https://imgur.com/a/FiNrVCQ, x-axis is year of diagnosis, y-axis is Incidence per 100.000. I used European Standardized Rate correction to correct for changes in age distribution, which is standard here. Top blue line is total, the other lines all denote different origins.

I don't know who Alex Berezow is any more than I know who Joel M. Moskowitz is, but openly ridiculing the entire state of California for their stance on public health and safety in your opening paragraphs isn't the best way to sell yourself as a voice of reason in a discussion about public health and safety of 5G.

Edit: I was also prompted to spend ~30 seconds researching who ACSH are since everyone critiquing Moskowitz in this HN thread seem to be posting links from that website alone. Didn't take long to discover they're a privately funded pro-industry advocacy group.