Nazism is despicable, but censoring the Nazi voice is effectively the same as preventing citizens from having those "dissident thoughts" that contradict modern western government, and you actually can receive prison time for expressing Nazi sentiments in Germany so the government absolutely does "oppress them" for having those thoughts.
China views western influence the same way. In China's history, rule by the west has seen terrorism, imperialism, and corruption, which have lasted far longer (since the 1800s when the First Opium Wars were fought), and I would argue have led to greater suffering (certainly the numbers are in favor of this being the case).
Accepting government censorship in the EU is, in principle, no different from censorship in China. The only difference is the flavor.
For the record, I support neither.