Calling someone you know nothing about stupid isn't too charming, or sensible. But it really is a matter of language; there are other ways of expressing total disagreement of course. And even the toughest people can be hurt on these sites sometimes.
However, this forum is very robust, and I like that; too may of them are totally insipid, with nobody saying anything of interest and majoring on repeating how much some car looks like some other car - as if it matters. Boring!
FF is not boring - usually - and for better or worse it probably is best to let people express themselves as they wish. Ultimately a pattern forms and the person's idiosyncrasies reveal themselves and comments then get a perspective.
Too much policing is never a good idea.
PS, Fiat now recommends 60,000 changes.