^^^ Sympathy for Joe isn't the important part.
If you have a website, and you have rules for people joining your site, that's fine and good. You have control over your site, welcoming people on who follow the rules, and getting rid of people who don't.
But when your site becomes so large, with such a great number of "members" that you can influence presidential elections with it, the situation changes.
Nobody is going to tell the truth all the time. Most people will tell intentional lies a little. Some people without even knowing that they just said something that was untrue. But if you manipulate people like Joe on the basis of simply reporting the news, doesn't mean you need to have sympathy for Joe. It means you need to correct freedom of speech in a website that has become a bastion of communication for all people.
Dump Joe for his proven lies, not that he reported the news and threw in his personal opinion.