Because the world just isn't that simple anymore. 100 years ago, I would totally agree that the govt stopping citizens from spreading false information would b

Because the world just isn't that simple anymore. 100 years ago, I would totally agree that the govt stopping citizens from spreading false information would be a violation of the first amendment. But we now live in a world where the generation of misinformation is automated. Controlling communication on social media does not necessarily imply stifling the speech of a human. It's very possible that we currently live with an internet where more than half of accounts represent entirely fabricated personas created specifically to generate malicious propaganda. And they know that if they can get a judge to defend their antics as "Free Speech" they will be free to manipulate the general population however they want. I agree that we need to be careful about protecting free speech online, but if we act like every character that goes over a wire is protected speech, we are digging our own grave.