I think the real issue is the users. I mean, Facebook makes it easier to find people who are like you and believe the things you do, but Facebook didn’t make you believe the earth was flat.
The fact that people believe the earth is flat shouldn’t be blamed on social media, because it’s a much bigger problem than that. Those people have managed to grow up wrong, with terrible education and horrible life choices, and maybe they find each other in groups on Facebook but they sure weren’t made this way by the internet alone.