“right wing extremist” is surprising, though possible I suppose. There are some right wing bigots.
However, MOST of the worst Anti-Semitism has come from the left-wing, such as National Socialist Nazis and Communists and “progressives” and other leftists.
at any event, it is a very very sad statement from Germany!
All of the antisemitism comes from the left. There is no “right wing” in Europe as it’s understood here; just varying degrees of socialism.
And it’s not possible to be on the right (in the USA) and be a bigot.