Ed Rampell: But in a country still troubled by racism, where hate crimes are on the rise — from nooses and KKK hoods at the University of California San Diego to death threats against the first African American president — any month is appropriate for this engaging interpretation of the life and death of Emmett Till, the martyr who launched the Civil Rights movement. Three months after Till’s murder, Rosa Parks stood up by sitting down in a segregated Southern bus.