It isn't. A right wind millionaire and his media outlet started a fake campaign against the potential judge. Other media and social media jumped on it as well and the "normal" conservative party was "concerned". A lot of heel-dragging later, the judge had enough and withdrew herself from consideration.

In Germany it's often illegal to make strong statements like this unless they can be proven beyond a reasonable doubt. Is that the case?

(That's partly why Germany is getting infested with Nazis again. You can go to jail for calling them out.)