People on the left instinctively believe in communal action, the role of government and the efficacy of international agencies such as the UN. They were always going to believe in climate change; it’s the sort of problem that can best be solved using the tools they most enjoy using.
The right tended to be sceptical about climate change from the start and for exactly the same reasons. It’s the sort of problem that requires global, communal action, with governments setting rules. It is a problem that requires tools they instinctively dislike using.
This applies to all manner of left-right divisiveness, not just climate change. These are deeply embedded philosophical differences. But they do not mean that a person holding a viewpoint opposite from yours is part of the Evil Empire.