IMHO it would make a huge difference to this forum if all of us could just take on board the following:
(1) A post can be absolute crap, but that in itself says nothing of any significance about the poster.
(2) Consequently, saying that a post is crap is not a personal attack on the poster.
(3) "Crap" applied to a post is simply a vernacular way of saying "wildly wrong" or "fundamentally (apologies for the pun) misguided".
(4) The way to respond to a "crap" post is to produce reasons for thinking it is wildly wrong or fundamentally misguided, not to resort to personal remarks about the poster.
PS I try not to produce crap posts, but I am happy to admit that I don't always succeed. I do though make sure I don't indulge in name calling -- except when engaged in banter with Dave.