The point is in the air quotes, as parent was (and is) being condescending and escalatory rather than engage in a comradely way. My hope was that by pointing out they were being condescending to more than just myself might give them pause and to change the way they were interacting. As you can see, that strategy of mine didn't work lol.

Your question is about relevance, and I actually agree. That was actually my point in its own less direct way. My grandparent reply was to say they were mischaracterizing a sentiment but the response didn't actually address that, so I drew attention to the misdirection. I think I was unclear about that being the point, though.