It would be interesting to have a sort of two-column format, where one column is who you normally follow, and the other column is an auto-generated list of people in the most opposite social-graph cluster.
The lifeblood of places like Twitter is the ability for people to get into loud arguments that people feel matter more than they actually do. If Twitter ever actually did a full purge of one side of the ideological spectrum they'd find a massive decrease in interest. People want to fight deep down and so need the other around.
Then again, that takes more than five minutes.
Though as you say, it might be necessary to understand them to prevent such extremism from spreading. But at that point it's very well worth asking if all that 'understanding' is really more effective than just banning such platforms.
Worked for Reddit, for instance. There was a study that showed that the prevalence of hate-speech was decreased after they banned the racist subreddits. Even people engaged in those communities became less extreme after you've removed their echo chamber.
"we looked at what they're saying and what's caused them to feel a need to say it."
While that might be needed, Gab is not the place to do it.
Somewhere not blocked by the anonymity of the internet. When online, especially at a place like Gab, or even Twitter, people are predisposed to behaving in more of a trollish, uncharitable way. In person, many of those behaviors don't happen.
"with people who are actively censoring what someone says"
I'm sorry, but I can't continue after this. You set up this sob story about not treating those on the alt-right as people, yet decry others telling the alt-right that they have to treat others as people, and not, for example, say that Jews should be treated as livestock. Its part of this really shitty mindset that people must tolerate the alt-right, but they don't have to tolerate anyone else, and should be encouraged, even, to shit on others.
If they want respect, they need to show it to others. If they're not willing to do that, then it's no surprise that they feel they get no respect in turn.