Whether or not an individual is sane may have some bearing on how they take the meaning but, more important, is whether or not an individual understands words and their meanings.
Words are hard, I know… But if I understand words correctly (and I do), it means that he is not saying you SHOULD NOT have posted it, but that he doesn’t understand WHY you posted it. As he said, with the words he typed earlier (words which mean things), he was just wondering if there was a point that he was not seeing. That is how I (a sane person) take it, based solely on the meaning of the words themselves. I can not speak for those that do not understand words and their meanings.
I hope this helps. (That means that I hope that what I have written helps).
Sincerely,
J.L.