It's a clumsily made point, but I think the gist is that the letter asks AI to align to a certain ideal vision of the field of math, that the math community itself is not well aligned to. I don't think the article makes this point well, though, just by listing these incidents. Don't get me wrong - each incident is important and worthy of attention in its own right, but I find the overall argument to be pretty weak and strongly reeking of whataboutism.