Editor’s Note: Sign up to get this weekly column as a newsletter. We’re looking back at the strongest, smartest opinion takes of the week from CNN and other outlets. CNN  —  In 1917, British analysts deciphered a coded message the German foreign minister sent to one of his country’s diplomats vowing to begin “unrestricted submarine warfare” and seeking to win over Mexico with a promise to “reconquer the lost territory in Texas, New Mexico and Arizona” if the US entered the world war. When it became public, the Zimmerman Telegram caused a sensation, helping propel the US into the conflict against Germany. “Never before or since has so much turned upon the solution of a secret message,” wrote David Kahn in his classic 1967 history of secret communications, “The Codebreakers.” The Germans had taken great pains to keep their intentions confidential, and the codebreakers in London’s “Room 40” had to do a lot of work to decipher the telegram.…