Martin Luther King was a great man for many reasons, but one of the most important was his honesty. Here is Rep. John Lewis (who was one of Dr. King's friends) description of one incident:
During an appearance at Harvard University shortly before his death, a student stood up and asked (Dr. Martin Luther) King to address the issue of Zionism. The question was clearly hostile. King responded, 'When people criticize Zionists, they mean Jews, you are talking anti-Semitism.'"
Thus, Dr. King identified the cloaked anti-Semitism of the European elite and the American left. His lesson should be remembered today, and is in this article (which quotes the Lewis passage above).