The censorship is likely an uncomfortable trade-off. In an ideal world, we would allow speech and carefully police when that speech turns into death threats or

The censorship is likely an uncomfortable trade-off. In an ideal world, we would allow speech and carefully police when that speech turns into death threats or violent action. However, state capabilities and surveillance capabilities are not sufficient in the west for the second part of that. So the devil's compromise is to restrict the former (because people who would be motivated to issue death threats or commit violent actions are frequently encouraged by the former actions of free speech).