I think you missed the first sentence of my comment. Games have been blamed above other media for years and years and years. That is not whataboutism.
Edit: or the last sentence for that matter.
It's almost like this kind of content on Steam is a symptom of a bigger problem.
I never suggested that Steam doesn't need improvement. There is extremist content being posted. But it is definitely part of a larger (frankly, much more obvious) problem. Calling attention to a root cause is just not whataboutism.