This is demonstrably not true - have you been on Twitter? You'll find every extreme represented there. Including accounts/messages not globally removed but marked "illegal in Germany".
Not really. Downvotes are specifically intended for comments that don't contribute to the discussion, so downvoting these wouldn't indicate disagreement or censorship.
You know there's a difference between Larry flint not being legally allowed to peddle smut, do satire etc. and people telling you they don't like your opinion and not giving you a platform, organising boycotts etc?
Also, I assume you are completely offended by fox news,OANN etc. lack of progressive voices? I agree, conservative media should open themselves up to platform more leftwing ideas in order to ensure diversity of thought. Similarly to the conservative subreddit, which is enforcing its groupthink the same way the literal communist subreddit is.