I don't really read many (actually, any) of the long posts here on what to eat and what not to eat as I'm really fortunate that I can eat all types of food such that for me, it's all about cals in and cals out only.
I note though that a lot of diamondgeog's "controversial" posts are in the carb counters sub-forum. Likewise, the IEers post in their own threads or the CIC sub-forum. Yet other groups post in other forums meant only for them. IMO, this is the correct thing to do to avoid flounces and drawn out arguments.