Is this instance of the word 'girls' hate speech?

Well, it was this post, in a thread previously pretty focused and detailed about the differences between the two eye-care specialties, where jtur88 remarked

This usage was gently pushed back on by another poster, leading to the following exchanges:

At which point jtur88 was “pre-warned” by a mod and flounced:

Sexist, somewhat demeaning, incoherent and illogical speech, definitely, but I would not classify it as “hate speech”. Except in the sense that I’d hate to speak like that.