Last year, in a series of "town-hall meetings" across the country, Americans got the chance to debate President Obama's proposed healthcare reforms.
What happened was an explosion of rage and barely suppressed violence.
Polling evidence suggests that the numbers who think the reforms go too far are nearly matched by those who think they do not go far enough.
But it is striking that the people who most dislike the whole idea of healthcare reform - the ones who think it is socialist, godless, a step on the road to a police state - are often the ones it seems designed to help.
In Texas, where barely two-thirds of the population have full health insurance and over a fifth of all children have no cover at all, opposition to the legislation is currently running at 87%.
Instead, to many of those who lose out under the existing system, reform still seems like the ultimate betrayal.
Why are so many American voters enraged by attempts to change a horribly inefficient system that leaves them with premiums they often cannot afford?
Why are they manning the barricades to defend insurance companies that routinely deny claims and cancel policies?
It might be tempting to put the whole thing down to what the historian Richard Hofstadter back in the 1960s called "the paranoid style" of American politics, in which God, guns and race get mixed into a toxic stew of resentment at anything coming out of Washington.
But that would be a mistake.
If people vote against their own interests, it is not because they do not understand what is in their interest or have not yet had it properly explained to them. They do it because they resent having their interests decided for them by politicians who think they know best.