Germany's top anti-discrimination official is adding her voice to growing protests over a regional shooting association's demand that an expert marksman give up his championship title because he is a Muslim.

Christine Lueders told the Historic German Shooting Brotherhood Federation that its stance is discriminatory and intolerant, writing in a letter that it should live up to its name and act "in the spirit of true brotherhood," the dpa news agency reported Tuesday.

The umbrella organization says its constitution stipulates it is an "association of Christian people" and has defended its stance since it became public on the weekend.

Mithat Gedik, born in Germany to Turkish parents, won the title July 18 at his western German club.

The local Catholic church, Muslim organizations and others have rallied to support Gedik.