Some probably gave up, some probably moved on, some came here, some stayed there. There's no clear answer, but it is what it is.
Some are probably lurking, but a lot of people are still addicted to reddit and their internet points and don't have much interest in leaving there.
Communities that go against the social justice agenda are torn down and the people are scattered on purpose to avoid exactly what you seek -- a large collective discussion. The way they've chosen to fight facts and truth that don't align with their ideology is to make it so nobody can hear it.