Björn Höcke (center), a politician from the Alternative for Germany party, participates in a march in Chemnitz, eastern Germany, on Sept. 1, after several nationalist groups called for marches protesting the killing of a German man allegedly by migrants.

Björn Höcke (center), a politician from the Alternative for Germany party, participates in a march in Chemnitz, eastern Germany, on Sept. 1, after several nationalist groups called for marches protesting the killing of a German man allegedly by migrant