Anti-war sentiment is moving dangerously close to a place America must never go — putting our anger on the soldiers that have been fighting the four-year Iraq war. Some of this takes the form of minimizing what happened the last time American GIs returned from an unpopular war — Vietnam. Liberal commentators, such as MSNBC's Keith Olbermann, are diminishing the hostile treatment Vietnam veterans garnered when they returned from Vietnam. On the air on Thursday, Mr. Olbermann disparaged the old report of Vietnam veterans being spit upon when they came home: "And, oh, by the way, there is not one...