Macklemore and Ryan Lewis are finding supporters — and critics — for their new song, “White Privilege II.”The new tune, which Macklemore discussed Friday on social media, explores racism, police shootings and the Black Lives Matter movement. “They’re chanting out, ‘Black Lives Matter,’ but I don’t say it back,” he says in the song. “Is it OK for me to say? I don’t know, so I watch and stand in ...