So, some anonymous commenter left this:

jeez, o’brien, don’t you know that military generals are above criticism? i thought everyone knew that. well, that is of course unless you happen to be a conservative. THEN it’s okay to criticize them, or rip on people who have served their country. yet another reason why you should be a conservative (they get a free pass on hypocrisy).
i disagree with the right’s interpretation of the ad and their overreaction to it. in the end, it doesn’t matter, because they cannot argue about the content & context of the ad, only the headline.

Um, the ad was condemned by the House by a pretty large majority:

The House on Wednesday overwhelmingly voted to condemn the liberal advocacy group MoveOn.org for a recent advertisement attacking the top U.S. general in Iraq.
By a 341-79 vote, the House passed a resolution praising the patriotism Gen. David Petraeus, the commander of U.S. forces in Iraq, and condemning a MoveOn.org ad that referred to Petraeus as “General Betray Us.”
[…]
Wisconsin Rep. David Obey, a veteran Democrat, recounted how he left the Republican Party during the era of Sen. Joseph McCarthy, R-Wis., and said that lawmakers have an obligation to criticize their allies as well as their enemies when they go too far.
“I’ve got an obligation to be equally upset when that kind of juvenile debate emanates from the left,” Obey said.

It’s not just the right who think that the ad went too far, the leaders of your side thought so as well. I didn’t post this because I thought everyone knew that the House (and the Senate) condemned the ad, evidently I was wrong.