@Walter Hinteler,
Since you mentioned Hitler:
The inaugural "Jews in the AfD" group was founded in Offenbach today, ostensibly calling out anti-Semitism – and the irony cannot be ignored.
The phenomenon of right-wing populist parties acting as Jewish communities' allies is not new but can be observed across Europe.
An alliance between Jews and right-wing populists cannot work in the long term. This is because right-wing populists will only take a stand against anti-Semitism if they can use it to promote their anti-migrant agenda.
Many Jewish communities in postwar Germany were formed by Russian immigrants who stayed behind after the Soviet Union was dismantled. Today, Germans with Russian origins are some of the AfD's most loyal voters - the leaders of said group have the same origin.
More than 40 German Jewish organisations have now joined the Central Council of Jews' declaration "against the AfD" *. It states that the party was "anti-democratic, inhuman and in large parts right-wing radical". It represented "in no way the interests of the Jewish community", but was "a party in which Jewish hatred and relativisation up to the denial of the Shoah have a home".
*
Gemeinsame Erklärung gegen die AfD ("Joint declaration against the AfD", pdf, in German)