Just who are these stupid people he is talking about: The Democrats and the media.
He is saying that the people who put Obamacare together knowingly understood that if Americans had understood the Affordable Care Act, that they would have rejected it because they are too stupid. They therefore by intent made the Act impossible to understand to fool them into supporting what they would otherwise have rejected because it was good for them. When the good part will arrive no one asks. This is a marry in haste, repent in leisure moment which is the entire story of the Obama administration.