Basically, Stark was responding to a letter written by a veteran, saying that the veteran obviously didn't write it, because he couldn't possibly understand all the big words in it, and concluded by saying the equivalent of "drop dead", but that he would call back to discuss the realities of the Iraq war with the "dimwit" soldier, sometime soon.
Indeed, Stark seems to possess all the attributes necessary to be a fine committed Marxist. Classic A$$ole.