ANW
Good quotes from the 1957 Oxford School Dictionary. The thing is, in 1957 black people in America were barred from riding on the front of buses and from going to "white" colleges! The terms "nigger", "wog", "nignog" etc were in general use as derogertory terms for black people.
British Scum' which has given you that freedom to decide.
You seem to have omitted the many thousands of black African, black Caribbeans, Indian and Gurkah troops (to mention a few!) that lost their lives fighting for (our) freedom as well.