Are Gingrich and Hannity stupid, lying, or insane?

This clip is a few days old, but behold:



Think Progress has detailed how demonstrably wrong Gingrich is, but I'd like to address a larger question: are they stupid, lying, or completely insane? Consider this:

• Obama mentioned tire inflation not because it's his energy plan (it's not--warning, pdf), but because a little personal responsibility with our cars would effect the same change as drilling offshore for oil.
• After a few days of poking fun at Obama for mentioning tire inflation, McCain acknowledged that he "doesn't disagree," an odd construction that means, essentially, he agrees.
• For Hannity and Gingrich, high oil prices weren't an issue until they became a political issue, one that, unfortunately, most people aren't well informed about. Harping on the tire inflation "gaffe," which wasn't a gaffe, is simply noise that continues misinformation.

How could these wealthy people with immediate access to information possibly not know any of the above? And what's worse: knowing all of the above, as well as facing growing acceptance that global warming is real, they continue to advocate the worst kind of politics and energy ideas.