They've used this principle with incredible effectiveness against social conservatives. Seems to me we could be using it against them with incredible effectiveness on environmental issues.
Same for those trying to foster Christian guilt over rejecting the invasion of illegal aliens... being unchristian is shameful? OK... What do you call those who endorse sodomy when they support homosexual marriages or who support infanticide when they support late-term abortion (including BHO)? Shameless hypocrites perhaps? Or just progressive Democrats?
I see this when they go after guys like Scooter Libby and Tom Delay to name a few.