Earlier quoted context omitted.
Critical infrastructure has never been regarded as a public platform. No one has been prevented from buying their own internet connection or DNS names and running their own site over the "common carrier" status internet backbone infrastructure. It's just a lot less useful when your goal is radicalization and you need to hit the widest possible audience to get conversions.
Is that guaranteed? Parler has found that the machines their code ran on could be taken away for having bad opinions. I'm not a defender of fascists, if anything I lean towards being happy when their megaphone is taken away, even when they receive the occasional punch, but the precedent this has set with the power of these companies is frightening for anyone. What if Amazon will refuse to do with business with people…
Amazon is not a common carrier: the cloud, other people's data centers, have no legal requirement to be neutral about what runs on them (and it's not even clear how this would work given the difference between compute and communications).