Bernd Höcke who leads AFD in Thüringen is a Nazi and this got confirmed by a court. He sees himself als some kind of incarnation or continuation of Hitler. AFD in Thüringen has won the election by a great margin. This is like defending NSDAP.
They probably aren’t literally Hitler. But there is a lot of damage and awful shit they can do in between reasonable and Hitler. And they are much further towards the latter than anyone should be comfortable with.