I'm sympathetic to this argument in many ways. For one, extremist movements tend to thrive on oppression - being censored "proves" the system is rigged against

I'm sympathetic to this argument in many ways. For one, extremist movements tend to thrive on oppression - being censored "proves" the system is rigged against them. But the argument in this article is very flawed. For one, yes, Germany has a far right movement. The real question is, how influential would it be without all the legislation to suppress it? Social norms matter, and legislation can reinforce those norms. It's important to pick the right battles, however. Laws can be used to create pressures against becoming e.g. a white supremacist as long as the majority of the population opposes that ideology. OTOH, try using laws to make people go vegan, and it's not going to go very well in the current situation.