There is a strong anti-global warming consensus in the US simply because, the whole issue was brought up by the liberal, hippie, tree-hugging democrat, Al Gore. the whole issue is disputed by right-wing conservatives purely for political reasons.
When your pockets are being lined by huge Amerikan oil companies, you know, the companies that sell the product that is causing the problem, then of course you want the issue disputed and buried, preferably in the holes left from the mining and pumping.
You really have to be blinded by hate not to understanding that removing carbon that has been sitting in the ground for millions of years and dumping it into the atmosphere is going to have some adverse affect.
First, I think global warming is real, and evidence suggests it was caused by man.
Having said that, Al Gore has gotten magnitudes richer off supporting AGW than anyone opposing it. There is so much more money supporting global warming in grants, contracts, special funds, etc, that the line of reasoning you are using is ridiculous.
Your last statement is not logical at all. Thats not some automatic conclusion, its a result of extremely complicated modeling. There has been more carbon in the atmosphere than currently. Partisans demonize their political adversaries.