What an a-hole.
He's an associate professor of English, so he goes on a bit. But the bottom line is that he is unable to spare 18 cents to show his appreciation for those who are willing to fight so he can associatively professorate in peace. It's easier to believe he doesn't support the troops at all than to accept his reasoning.
It's kind of like how liberals indignantly insist that conservatives don't own the American flag but when they see it act like they are vampires splashed with Holy Water.