Perennial provocateur and man of mischief Spike Lee has always made films about racial hostility and growing unrest in America, but his instincts are uncharacteristically sharpened for “BlacKkKlansman,” which finds the helmer trying to pull off one of the most mainstream features of his career while still pouring his cinematic DNA all over his latest joint. Lee’s fired up with the effort, but tries to remain respectful to the steps of suspense and police procedure, in charge of an undercover cop story that doubles as a cruel reminder about racism and its longstanding hold on the nation. “BlacKkKlansman” isn’t subdued by any means, but Lee is atypically patient with the tale, making careful moves to strengthen his comparisons, fuel his outrage, and still remain faithful to a tale of cops looking to make the largest bust of their careers.  Read the rest at Blu-ray.com