I try to stick to 3 comments per person max. That's enough to consider their point and make any clarification to your original point or make a counterpoint to their point.

Continuing the discussion much further beyond that is in most cases counterproductive. Wish them a nice day and move on. And report and block any users who use pejoratives against you.

Are you sure they're not just confounding variables?

I've never heard of a struggling Vietnamese pho restaurant. I live next to like 5 and they've been in business for decades.

Yeah, I remember reading this story where they force this poor guy Ernst Röhm to shoot himself because they found out he was gay.