They may be right-wing, but denigrating a Holocaust memorial is going too far, even for Germany's up-and-coming Alternative for Germany (AfD) party.
On Monday its leaders overwhelmingly voted to launch an internal investigation that could lead to the expulsion of Bjoern Hoecke, leader of its branch in the former East German state of Thuringia.
At issue is a speech he made last month to young party supporters in Dresden, in which he called Berlin's Holocaust memorial a "monument of shame".
Ten days later, he was barred from taking part in a Holocaust Remembrance Day ceremony at the Buchenwald Concentration Camp Memorial.