Hmm, but wait. If he were anti-D&D, and say, Pro-7th-Sea, that might be a different matter. But somehow I doubt that's what they're talking about.
"It may be typical of the pro-Obama Dungeons & Dragons crowd to disparage a fellow countryman's memory of war from the comfort of mom's basement, but most Americans have the humility and gratitude to respect and learn from the memories of men who suffered on behalf of others." from John McCain for President.
The thing is, not only is this fatuous, but it's wrong-headed, too. You don't play Dungeons and Dragons for 20 years without learning something about courage! Is it 4th ed? AD&D? Really the whole thing is very muddled.