Bayern's fans are not the first to protest. Last weekend's game between Hoffenheim and Moenchengladbach was stopped for 10 minutes after Moenchengladbach fans displayed a banner with Hopp's face in a crosshair.

Earlier this month, Borussia Dortmund fans were banned from away games against Hoffenheim for the next two seasons after insulting Hopp over several years, followed by several court cases.

Fans of so-called traditional clubs have been protesting against newly formed sides and the influence of investors for many years. The debate is said to continue and could endanger German football's development.

Bayern ultras claim to have acted in solidarity with other supporter groups. Dortmund fans were chanting similar offenses in their game against Freiburg. That game, too, was briefly stopped.

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