If this campaign were to suceed in reducing the US usage of oil I don't think it would have any effect on the ammount of cash supposedly going to the terrorists. OPEC works very hard to maintain it's income at a fixed level. If the US used less oil then OPEC would surely just put the price up.

There are much better reasons for reducing oil comsuption than doing it to reduce the funds going to terrorists. However valid the links to terrorism may or may not be, this campaign just sounds crazy. It is just this sort of craziness that gets the US a bad name in the first place.