They’ll do that anyway. They engage only in ideological proclamation, not critical analysis. They think truth is dictated by consensus.
You deal with these people by disenfranchising them and removing their opportunities to gain power, not by engaging them directly in debate. Never engage with an echo chamber if you don’t want the ideology of that echo chamber to infect others like a virus.
It hasn’t been a left wing vote for a long time, if ever.