Don't you see the difference in saying:
This [doing X] is stupid[, so don't waste your time doing it]
vs.
The person saying this is stupid
?
First is being helpful with no bad intentions, but just without sugar coating. This is discussing matters, not persons. I mean, someone like ataradov writes like that all the freaking time and I'm serious when I'm saying I don't remember it ever causing a misunderstanding before. You're the first I'm seeing having a problem with it, after many years hanging here.
Of course, after enough escalation and actual insults from your part, quite some many of us started really insulting you. You are free to actually ignore everybody as you said you'd do but failed to deliver. You are also free to stop reacting to every little comment you find nasty.