Contrary to what some would like it to be, this forum is less the Oxford Union Debating Society with its worthy interlocutors, than a discussion down the pub between people, mostly with a social conscience, and with an interest in, but very little actual expertise/experience in, politics.
It is an unmoderated, privately owned forum with very few, if any, rules and, yes, it does get adversarial, but as in any such situation people quite legitimately use different tactics to (as they see it) get one over on the opposition, including insulting or goading/trolling. Neither of these types of response are edifying but both are cheeks of the same arse when things turn adversarial.
And the saddest thing about it all is that none of this really makes any difference at all to anyone bar the protagonists.