Both parties are at fault here.
My impression is this:
1. TK is a passionate dude who has dedicated a significant portion of his life to this stuff.
2. TK gets an apparently* soft-ish sample of an RH and goes on a bit of a rant. Rant might be the wrong word. The discussion is kind of all over the place. On the one hand, its about the specific sample. This component is supported by the actual Rockwell test, but I felt went too far given that the sample was only barely out of spec (if at all, especially considering standard test margins of error). On the other, the discussion is about the spec itself, which is probably right, but doesn't really recognize that this isn't really a RH-specific issue. There is also some reasonable but unflattering supposition going on.
*The mod was a flipper delete, which seems unlikely to affect the Rockwell on the flat.
I think it's important to recognize where this is coming from (in my opinion). TK is a knife "nerd" in the best way. His business "lives" in the gap between how production knife makers do things and how they *should* be done (in his view). I suspect some of this was partially fueled by some braggadocio, but it isn't wrong (again, IMO).
3. RH responds by, essentially, calling TK a clown who doesn't know what he is talking about (I am paraphrasing).
This, combined with some anti-asian sentiment (from onlookers, not from RH) is the worst kind of fuel for the fire.
Now, I get why RH might be pissed: he's got 1 knife out of many that is barely below spec (if at all) and entirely consistent with industry standards.
4. TK can't back down now, because saying he doesn't know what he is talking about essentially undermines TK's entire legitimacy as a business. And he wasn't really "wrong," just overzealous.
5. Because TK doubled down, RH serves a cease and desist. While I understand it, it seems like a pretty awful thing to do and significantly raises the possibility that everybody here loses. I can think of a bunch of different ways to have handled this better.
I tried to be even-handed in this summary, but it is probably clear where my sympathies are. You all can decide for yourselves, but I would encourage people to go look at the actual exchanges before forming any conclusions.