That's a nice sentiment, but it's built on the idea that one should just ignore the crazies and they'll automatically be marginalized. It doesn't address the situation where one big group decides to weaponize its finge contingent, or where an angry fringe forces itself into what was intended to be a less heated conversations, as in this recent example:
https://www.npr.org/2020/08/25/905785548/unmasked-protesters...They repeated the stunt approximately yesterday but one of the organizers was arrested this time; he handcuffed himself to a chair but didn't consider that it was on wheels, so they just rolled him out of the building. https://www.npr.org/2020/08/25/906046911/ammon-bundy-is-arre...