Things have been tense since the Terri debate, perhaps because the anonymous Internet encourages vicious name-calling.
If we were all sitting in a living room discussing the First Lady's speech, we'd just agree to disagree and things wouldn't get to the boiling point.
I, for one, while at first a little startled at the Desperate Housewives joke, thought Laura was very funny and graceful at an event where the whole point is to roast the President.
IMO, she meant it only in a literal sense. She wasn't implying that she was capable of emulating the characters on the tv show.