I belive the point they were trying to make is that noone needs to give up their ideology. Keep it but hang out in public spaces where other or opposing ideologies are present.

Even if someone does not want to change their position, they can still learn and understand why someone has an opposing or different one.

There are always spaces in which nonviolent or noncoercive interaction can exist.

Most people think they know they understand by now; the other side is perilously silly at best, or prefers they were dead in the worst case. And they're right so often that this heuristic is too useful not to act on. I don't blame anyone for banning or flaming anyone anymore, given that. And I admire anyone who can still have that unevenly prized nonviolent noncoercive conversation. Especially if it can actually be meaningful and not just a tired re-treading .

What makes you think reddit and discord have to host your ideology if they don't agree with it?

Nothing. But my ideology is mainstream, and it is incompatible with the other one. The other ideology can have Voat. Why should they also have Reddit?