I think that one thing social media is really good at is amplifying vocal minorities, to the point that they start sounding like majorities. Twitter does a particularly good job of this--probably because of how easy it is to get bots and sock puppet accounts going there.

The even bigger problem is that the 24-hour news cycle in the US is so desperate for clickbait that they take the worst of what circulates on Twitter and report on it as if Twitter is an actual news source, which of course it's not--it's just a bunch of people (and bots) espousing their opinions.

I think the real solution is to get people thinking critically and realizing the difference between fact and opinion. But, easier said than done!