He has a point, though. WAR is a comprehensive rating system that accounts for defense. 1.2 is a pathetic number, and not the WAR of someone you'd consider an all star.
He's welcome to point that out, but...
Personally, though, I think WAR is flawed.
WAR is such an abstract stat that I'm not sure how seriously it can really be taken. I'm all for noting Dunn's defensive deficiencies when considering his overall value as a player, but we both know that quoting WAR is just SF "Dunn's defense cost us 30 runs in the first 1/4 of the season" grasping at straws because he can't stand to acknowledge that a career (offensive) year for Zimmerman is a career AVERAGE year for Dunn.