OTOH he is not necessarily "insulting people": he is likely correct that debate class (or logic class) is the best venue for learning about Hanlon's Razor and other ideas. But the application of such tools to real-life (as opposed to simple logical problems), where logic may not completely describe problems, is far more variable yet IMO still useful.

I, for one, do not feel insulted and even feel that his post is a useful elaborative warning along the path to "truth", which in the real world may have many traps, wrong ways and pitfalls.

Insulting bad arguments might encourage people who make those arguments to leave.