He is one of Muslim America’s rising young activists, yet he is reserved in his comments on caricatures of the Prophet Muhammad, the Mideast conflict and the war in Iraq. Instead, Rami Nashashibi speaks out against Muslim-owned liquor stores, protests on behalf of Latino workers and denounces mistreatment of blacks by the criminal justice system. On Monday he joined Mexicans, Koreans and Poles in a massive march for immigrant rights. Such issues are not commonly associated with Muslim activism, but Nashashibi, 33, believes Islam calls on the faithful to focus on gritty problems in urban areas. For him, waging a war at home against poverty, gang violence and other modern plagues is key to uniting Muslim Americans.