The polls prior to it being deemed passed were pretty clear, and life on the ground here is pretty clear. No one likes Obamacare. It either went to far, or not did not enough. But it doesn't enjoy support of even a large minority of Americans, much less a majority.
And while I do agree that in general it's better to solve these little differences through the political process rather then extra legal or lethal way, if there's one thing history has taught us it's that there's some lines you don't allow your government to cross. To many people have died or been enslaved while trying to work it out peacefully. Peace is good, but there are some things that require blood right now. Free people don't dare let them progress. A credible attempt to disarm a population is one of those things.
Now that being said, I don't think our current Congress has a credible chance of doing so, and I have enough faith in our process to let it pay out. Really. Even in NY where the laws have been passed, so far they're just words. If the NY law enforcement starts a valid attempt to round up and kill or imprison folks who are armed, then we might have to reconsider letting NY's process play. But so far, they're not, the dude with AR mags not-withstanding.
I would also argue that a large portion of overturning prohibition was the overwhelming willingness of the public to publicly ignore those laws, and fight law enforcement if needed to preserve their freedom. Which is what NY'ers are discussing currently.
As a parting note, words have meanings. Some things are natural rights and others aren't. It's not a matter of opinion. A human has the right of self determination. And of self defense. and to defend those rights to the death if he chooses. He does NOT have the right to other peoples labor, which in the end is what healthcare is. So it matters not how many people think healthcare is a right, they are wrong. The only healthcare you have a right to is that which you can administer to yourself.