Heres the thing, this is what huamns are. A shithead may be a shithead to one but a golden god to another. A truly open forum will reflect that. Moderation effectively splits different views and both can thrive without interaction with one another (echo chambers). I personally dont mind extremist views because it reminds me they exist and I am of sound mind to ignore them. However, I know not everyone is and I know the dangers of letting extremest views go unchallenged. I doubt technology can help us here. Education can probably do a lot more. We need to be better humans, accepting of others and critical of ideas instead of people.