Not so shocking nowadays.
Man Made Hitler Salute in Front of Police Officer and Was Not Arrested
The municipality, prosecution and police of Amsterdam regret that a police officer did not act correctly regarding a man who brought the Hitler salute. This occurred during a pro-Palestinian demonstration where the police was present in order to assure that no discriminatory or anti-Semitic expressions would take place. One of the demonstrators made the Hitler salute and a female police officer talked to him, but did not arrest him. As this was filmed, the police is now investigating the issue.
Video of the march but not of the incident