With Vladimir Putin’s dispatch of Russian troops into Crimea, our war hawks are breathing fire. Russophobia is rampant and the op-ed pages are ablaze here. Barack Obama should tune them out and reflect on how Cold War presidents dealt with far graver clashes with Moscow. When Red Army tank divisions crushed the Hungarian freedom fighters in 1956, killing 50,000, Eisenhower did not lift a finger. When Khrushchev built the Berlin Wall, JFK went to Berlin and gave a speech. When Warsaw Pact troops crushed the Prague Spring in 1968, LBJ did nothing. When, Moscow ordered Gen. Wojciech Jaruzelski to smash...