Totalitarian governments rely on distraction and misdirection of the populace in order to survive. Without it to use as ammunition to unify the people against a common "enemy", the very nature of its limiting rule forces the populace to start questions to try and improve their own condition. Questions like "freedom" and "censorship". Totalitarian governments are not equipped to satisfy difficult questions like this and will either adapt or crumble.

Thus the best way "oppose a government that is the sworn enemy of values you regard more precious than your own life" is to allow it to face its internal problems without giving it the "enemy" it so desperately needs as ammunition to use against you.