And here we have arrived at the crux of the problem. Should we just throw up our hands and say "Then just don't use American tech"? I think this move by Uganda (and your comment) illustrate the same frustration that we in America feel at the power these monopolies are exerting over public discourse (for some various definitions of "public discourse").
I don't think we can't not use it. But anyone on AWS or GCP needs to have a plan for the case where their business is suddenly deemed unacceptable (for whatever reason) and they may get cancelled.
The entire world cannot now use Parler (disclosure: I've never downloaded or used it) because a hundred or so people broke into a US government building for 2 hours.