Nah, those aren't the same thing, for no other reason than they're on opposite sides of scientific credibility and near universal scientific consensus. If Leo were a climate change denier, then he'd be doing the same thing and deserving of as much ridicule for flapping his dick suckers on a subject he knows nothing about.
Saying we should do something about climate change is more like saying that we should support the fight against cancer. You don't have to be a medical doctor or a medical scientist to know that cancer is bad m'kay? OTOH if you went on about how stuffing steamed broccoli up your ass cured your pancreatic cancer, STFU, m'kay?