Kid Rock has frequently used the Confederate flag as the backdrop to his performances, but following the Charleston church shootings last month, protesters are asking the musician to terminate his association with the flag.

Earlier this week, the Detroit chapter of Al Sharpton’s National Action Network met at the Detroit Historical Museum to protest Kid Rock’s use of the Confederate flag. Rev. Charles Williams II, the president of the group’s Michigan chapter, called Kid Rock “the home-town hero who is a zero with the Confederate flag.”

National Action Network political director Sam Riddle said the Confederate flag has a deadly meaning in the Motor City. “How in the hell can Kid Rock represent Detroit and wave that flag just generating millions and millions in ticket sales — a flag that represents genocide to most of Detroit?” Protesters said if Kid Rock does not stop using the Confederate flag, they will boycott the museum where the “All Summer Long” singer is included in an exhibit covering 100 years of music in Detroit.