Quick: If you had to pick one classic Christmas song that the thought police would deem racist, which would it be? If you said, “White Christmas,” congratulations! The 82nd Annual Rockefeller Christmas Tree lighting last Wednesday was interrupted by protesters in the wake of the grand-jury decision to not indict an NYPD officer in the death of Eric Garner. The lighting went forward as planned, and Hootie & the Blowfish’s lead singer, Darius Rucker, sang Irving Berlin’s “White Christmas.”