The unique problem of the internet is that it allows bad ideas to infect, fester, and mutate in the minds of others at a speed never seen before, without the natural safeguards that we've always had: peer-review and social acceptance. That leads to a spill-over of bad ideas into the public discourse which, in turn, resets society's definition for what kind of ideas are acceptable. A few rapid cycles of this, and we got our Post Truth World - it's not that truth doesn't exist anymore, but rather the speed at which the public discourse could verify, analyze, and accept ideas is simply not fast enough to keep up with the pace of new ideas that can reach the public discourse. In short, the immune system is overwhelmed, both at the individual and societal level, and we have a raging pandemic.
Yes, I am not an American, and I am arguing that the uniquely American religion of defending the "right" to "free speech" is misplaced in the era of the internet. This is one of the reasons I get a fall-of-Rome feeling in America.