Funny how that works, huh? With new information, positions change and we find that what we thought we knew wasn't accurate.
Hence, censorship slows progress and keeps everyone stupider for longer. Why are so many people these days creaming themselves over shutting down those that don't agree with them?! I'll never understand it.
If we simply let the stupid people talk, we'll all find out they're stupid and - bonus - why is as stupid as they are!