It's not that I don't "get the joke", it's just I perhaps don't think you should aim for big time laughs out of natural disasters. Sure, 24 people are dead (so far), millions are without power, but hey, let's go ahead and make jokes. It's hilarious, because it isn't happening to us.
On a different note, I might not be the best example of someone attempting to follow the principals of Christianity out there, but my own theological understanding was that God isn't crazy about people trying to assign intentions to his actions. But I'm sure the Bachmanns have some special line to God that I don't, one that says cutting the budget is the definitive moral act, not making sure people have access to affordable health care.
At some point, people will get tired of her act and the adults can talk about the future of the country, right?