Looks like you may have missed it, but that user is mocking what they consider to be a liberal perspective. They are attempting to lower the level of humanity and discourse on the site.
For sure but I don't think you do your cause any favors by commenting that books about taking turns in conversation and understanding how to respond when a family member dies is imperialist and heteronormative without providing any context as to why you believe that. I'm sympathetic to your position but my immediate reaction was, "that's nuts." I went to look at the link and, while I saw some outdated language, and I wouldn't be surprised if some of the "Social Stories" hadn't aged well either, it was apparent to me that this was a basic educational tool that some children would really benefit from. And it's difficult to understand why you would object to that.
If you wanna help people to understand your critique I think you should add context and not use such absolute language. That can really only reach the converted. If you feel it is your civic duty to represent these values, perhaps it's your duty to represent them in a way that's accessible to people who disagree but are reachable?
I understand your passion, I sympathize with your position, and this is my attempt at constructive criticism.
Or... In the US the word liberal was thrust upon them by the self styled "conservatives" by calling them that and also by turning the S-word into a slur. After the fall of the USSR and its satelites pretty much all progressives are social democrats, which is a subset of liberalism -- you know, because they also hate tankies, regardless of what the potus and his ilk think.
