Hoo boy! I wish I could explain it. I live right smack in the middle of a bunch of people who can be observed to do exactly that. They are oblivious to the irony or logical inconsistency. My only guess is that these people see pro military industrial complex hawks as defenders of the America in their fairy tales and implicitly trust that their motives are pure. The only other thing is maybe that they've been defending the MIC for so long that they've stopped (or were never) thinking critically about their position.