Why?
Global warming presents an existential threat to the fossil fuel industry. That has convinced them to do whatever they can to slow the acceptance of AGW science and the adoption of mitigation measures that might harm their sales. Investigations had already shown Exxon, Shell and Mobil having spent hundreds of millions of dollars to convince folks like you that climate science was highly suspect: scientifically (ie, that it was invalid) and ethically (ie, that it was biased). Apparently since Al Gore was the early face of AGW concern and environmentalism has always had more support from liberals than conservatives, the fossil fuel PR folks capitalized on that as an edge to work their way in with conservatives and have convinced you that liberals want to send us back to the stoneage by eliminating your supply of diesel to power the Cummins turbo V-10 you use to get to McDonalds and back. The accusations commonly made by AGW deniers fail basic sanity tests so it has always astounded me that folks putting out basic science arguments should run into such tremendous resistance. But they do. Go figger. Please.