Ira Chernus: On this Martin Luther King Day, then, American Jews face a choice. They can dwell on one casual, misinformed, easily misinterpreted remark that King made and use it to justify continued Israeli intransigence and violence. Or they can remember the words in which he summed up a lifetime of nonviolence, on the last night of his life — “I’m not fearing any man!” — and call on their own government to demand at least a start toward ending the conflict: a genuine halt to all settlement expansion.