A big problem with giving hate mongers a platform is that they do not return the courtesy.
Try posting a well-written and well-thought-out criticism of Trump on /r/thedonald and see how many seconds it takes before the post is taken down and you are banned. They are not interested in disagreement, tolerance and diversity. They are only interested in having a platform to spew their hate from.
So on the one hand we have a group that wants to have one (1) subreddit for themselves. And on the other we have a group that wants all subreddits for themselves. Seems like two different things entirely.
That is why moderation and balance are important. r/thedonald is an echo chamber lacking balance, and therefore lacking tolerance, diversity, and mutual respect.
well to be fair r/thedonald exists because this exact thing happens to trump supporters in r/politics
people love echo chambers it turns out. It's no surprise that all the big platforms are evolving to provide them. I think the market for well reasoned argument is smaller than OP thinks.
That's a problem with reddit, whose narrow-focused subreddits encourage groupthink. It's not specific to Trump, I'm sure doing the same in pro-Sanders or pro-Warren subreddits will have the same effect. Or indeed pro-Rihanna or pro-Metallica subreddits.
You'll have better luck with 4chan. People will call you a lot of bad words for sure, but they will also debate your point to death.
I remember when /r/politics was full of conservatives, right-wingers, the tea party, what have you. People would ask them to elaborate on their position, ask for references, or point out the flaws in their logic. The response? Moving the goalpost. Or "both sides do it." After a while, I ignored them because it wasn't worth my time to debate them. We won in a way; conservatives eventually stopped bothering to comment in /r/politics and retreated to their safe spaces.
Try posting a well-written and well-thought-out criticism of Trump on /r/thedonald and see how many seconds it takes before the post is taken down and you are banned. They are not interested in disagreement, tolerance and diversity. They are only interested in having a platform to spew their hate from.