I think that one issue is that everything on both sides is now a shibboleth when it comes to online discussion. The notion that “I believe in X, X has to be right, and your disagreement with X means you’re a [insert pejorative disclaimer]” quickly results in echo chambers that are simply not worth dealing with. Especially online, outrage and anger is easy to stoke, easy to respond with, and is corrosively addictive. Frankly, I’ve pretty much stopped reading a number of sites because they can’t stop with the outraged clickbait.
So I’m not sure there is a good place. I think the SDMB used to be better, but a combination of self-selection by users (not all of it bad) and some poor moderation has hurt it.