Given that the coward remains anonymous, it's always possible that this is nothing but a troll deliberately intent upon bringing disrepute to Traditional Catholicism. We should probably ignore him until he has the courage to actually come forward.
Unlike the argument itself, this is a question for which the poster's motivations are relevant.
If he is an infiltrator with the intention of damaging the reputation of Catholic teaching and traditional Catholics, then it seems good that I continue to oppose him. I should demonstrate that his ideas are clearly different from Catholic teaching and the vast majority of traditional Catholics, for that reason, reject what he is saying.
On the other hand, there is also a possibility that he is a loser incel who is so desperate for female attention that he writes things that he knows are outrageously wrong in order to provoke reactions from women online. If this is the case, it would be better to ignore him.
Either of these motives fits what he has been writing, so I am not sure which one to act on. When I showed some of his posts to my husband, his gut reaction was that it was a forum infiltrator, so I am more inclined to act on that possibility. It does, however, seem likely that most people are sick of this thread and wish that it would end. I can certainly appreciate that perspective.