on any public forum you're at the mercy of the whims of moderators, usually unpaid, which can be capricious, or absent, eventually leading to unproductive circular flamewars every time theres a new article on, say, Israel. Having the same arguments and going in circles when there's no new real information is just tiresome for everyone else involved (and some people get really emotionally invested). private group chat, you can tell those people to knock it off, or they're out of the group or slack/discord/zulip.