Why is global warming such a partisan issue?

So global warming will make for longer winters. That is a colosal jewel of ignorance. These are the jewels that the left proudly displays while they wonder why conservatives are skeptical of their unsubstantiated claims based primarily on political motives masquerading behind psuedoscience. It has warmed for the last couple of decades. Believe it or not, warming is good. Adapt if you are able.