I have observed what I've seen commented on elsewhere. There is a certain type of person who managed to skip the draft for themselves, and then proceeded to become overly supportive of the military and military aggression. Possibly as a reaction to the guilt of having not served when given the chance. There is a certain cowboy element to their approach. Prominent examples include Dick Cheney and George Bush.

By contrast people who actually served often, like John McCain or Al Gore, are strongly supportive of the military. But they tend to treat military service and action as the serious matters that they are.

The phrase that sums this up best is "chickenhawk".