I got your point, but since the argument "In one case scientific consensus was wrong so in this case it must be wrong" wasn't a strong enough argument, so I took what you were trying to say a little further... and yes the link between CO2 in the atmosphere and warming is much better understood than the link between cholesterol and heart disease. It's easy to run an experiment on how gases behave in the environment, not so easy to run an experiment on a live cardiovascular system.
Can you point to what specific policies related to curbing emissions would "cripple" the U.S.? The fact that energy might be a little more expensive for a little longer while we transition to new technologies? That sounds more like a growing pain than a crippling effect... and again, given the downside risk the growing pain would be negligible (unless you're in the oil industry or heavily invested........ a tiny fraction of people in this debate)
Also, I would think the acknowledgement that oil and fossils are finite resources would put you on the side of the debate that favors investment in alternatives. What gives?