I used to belong to Phx-Suns.net, too, and posted there regularly from probably about 2004 or so until maybe 2009 or 2010, sometime before they switched over to the new site. My experience was certainly different from yours. I would testify that it definitely had its clique-ish element. Maybe not everyone that posts there is or was like that, but there was a coterie of "cool kids" who tended to discount and belittle any opinion that differed from theirs. And going there now, I do still see many of the same users from back in the day.
They may be more welcoming of new members and there may be a softening of the regimented opinions since that time. I can't say if that's the case since I am not a member there any more or a visitor on a daily basis, like I am here.