'god I hate kids, I can't imagine anything worse'
How is that them insulting you? If, for example, you were a professional dancer and they said "God I hate dancing in public, I can't imagine anything worse" would you think they were insulting you as a dancer, or making a statement that they personally don't like dancing?
it totally validated their decision not to have kids because it was so awful.
And if you had your kids go away to camp for a week and you told your friend that you had missed them and them being away made you realise how much you loved being a mother and how it validated you having children because it was awful being without them would you be saying that to insult your childfree friends?
these aren't insults directed at you as they read from your post - although tone, intonation etc can add a great deal, so perhaps the were mean people being mean, it's not like childfree people and parents can't equally be mean. Some people are mean some people aren't. Whether they have kids is irrelevant to that, which is kind of the point we are trying to make - that assuming a sterotype about childfree people being "selfish, mean, cold..." is irritating.
Do people resent people saying 'as a black person, George Floyd was especially painful for me.'
A. as a mixed race person I get very very fucking bored of black people being brought in as the comparator to every situation
B. The whole point here is that the comparator would be "As a black mother, George Floyd was especially painful to me" as if young black men who get singled out by the police in America constantly couldn't possibly feel as much
But no, a group of childfree women on the childfree board getting irritated by things like "as a woman I find the fit of tights to be especially important" is not the same as black people speaking out against generations of racism and violence against them. You appear to be the only person who thinks it is.