Yes, dressing like Hitler SHOULD be a crime.
After World War Two, it was suspected that Hitler was still alive. There were thousands of Hitler sightings reported to the FBI. There must be lots of people who look like Hitler. It would be terribly humiliating for the poor wretch in this case if he isn't doing it on purpose.
Michael Cera (left) looks like Hitler's mother.
There was the movie Sherman's March. The filmmaker hears that Burt Reynolds is in town filming a movie. He goes to the hotel where Burt is staying. Then he spots him! Burt Reynolds! He goes to talk to him. Burt Reynolds tries to hide in a phone booth. The filmmaker talks to him and discovers it's just a local who looks like Burt Reynolds who came down with a vague idea of being hired as a double.
So, I really have nothing to say about it. I just hope they catch that son-of-a-Hündin.