Maybe because this is a privately owned site, and we need to abide by the rules of the site that Jim sets forth.
Last I looked "ridiculous, false, and slanderous, “insulting” things" towards other posters is not allowed.
But it happens all the time. By EverTrumpers. It’s been going on for years now, and they are allowed to continue. Usually one-liner quips insulting the poster.
Sorry, I understand the “we have rules” (which aren’t followed as above) and “private” stuff, but I’d think publicly spouting off as Trump does is worse than writing to single people on a forum with limited publicity, usually a reaction to their insults. Sometimes simply putting an opinion of Trump is enough to start this rabid reaction.