Look, I'll admit I'm a partisan, but I try to be fair. I honestly don't believe the lies you listed were lies. Arguably, the death panel thing is unreasonable demagoguery.
The lie the Dems told about Obamacare, which I believe is impossible to rationalize, is that "if you like your health insurance, you get to keep your health insurance, and if you like your doctor, you get to keep your doctor."
Here's how I would try to rationalize it if I were a partisan Dem. I would say, "look, obviously he couldn't promise these things wouldn't change for you. Health insurance changes from year to year. It always has. All he was saying is that if you already have health insurance, Obamacare doesn't really affect you and you don't need to worry about signing up on an exchange or doing anything different than you're already doing."
The reason why that fails is that Obamacare was specifically designed to disrupt the health care market. It had to in order to accomplish their goals of extending health insurance to the previously uninsured while still keeping costs contained. The designers, including I think Obama, although perhaps not idiots like Pelosi and Reid, knew that 50-80MM people would see very significant changes in their health care plans because of Obamacare. It hasn't even happened yet because Obama keeps delaying the employer mandate in order to push the day of reckoning past the next election.