What you say sounds like complete opposite to democracy, where wishes of people define the society. If you restrict propagation of information between two people, both wishing to produce / consume it, you (the society) now define what people should wish.
Not necessarily stating that I disagree with your idea, just that it is either it, or democracy, but not both.
There is a difference between sustainable democratic insitutions and brushfire populism. Especially when we are talking about teetering on the edge of genocide.
I'll take the lesser evil of censorship over the greater evil of hundreds of thousands of people dying (or more).
At some point you have to accept social responsibility and stop hiding behind the ”guns don’t kill people” argument. Facebook passed that point a long time ago.