While the author seems to understand the meaning of the license, on a linguistical or grammatical way, he fails to understand its spirit and intent. That is why he suggest restricting commercial use. His suggestion is nothing new, there do exists license by creativecommons.org with this kind rules, but they did not gain any traction.

The main issue, I believe, is to define what is good, what is bad, what is actual hate speech, and to some extent, what even is commercial. Good and bad varies a lot between groups and cultures. While some might view an opinion as hate speech, some other might find nothing wrong with it.

Thus, we cannot and should not put restriction on the kind of use.