The rudeness is what stood out to me.
It feels insane to be explaining this to an adult woman
don't expect you can drag me down into the mud with you
No wonder exhortations to be kind expressed in this way are met with an eye roll. And calling out hypocrisy and performative kindness enables more meaningful kindness.
I said on another thread that kindness requires a concession from someone - in showing it, one person gives time, effort, or even just thought, to another. In a sense, it's only really meaningful when it's as freely given as possible, and certainly without coercive pressure or emotional blackmail ("Be kind!" and the language used above).
So meaningful kindness also means questioning which demographics are pressured to be kind at their own expense - and respecting their right to question that (a kindness in itself).
The altruism thing fascinating - that question of, to what extent is there even such a thing as selflessness, if kindness is actually driven by the selfish imperative to belong? Etymologically, "kind"'s associated with "kin" and what's "natural". If it is about all that, then that really shows how artificial kindness can be - just fitting in with the social standards of the time in order to protect yourself. And that suggests how much more meaningful a kind of kindness it is to have the courage to step back and ask, "Yes, but why?" and "Is it, really?" first.
In contrast, that artificial, fitting-in side of kindness is really pronounced in this debate. You see it for what it really is in how readily and unthinkingly the ugly language of moral censure appears. That's not going to be about encouraging something genuine and beautiful. It's is about protecting and promoting one's own status as "kind" - and therefore "safe". It's also about instinctual, frightened boundary-building - a closing off ("I am, you're not - so there!") as opposed to more meaningfully "inclusive" reaching out ("I can see what you're saying, but I'd argue that...")