> There's a tremendous leap between "Not supporting Tesla because of Musk" and climate denialism.

Not really. Because it doesn't matter if you choose to support an alternative EV maker. If you actively campaign against Tesla you are hurting EV sales. There are Tesla's built today that should be purchased instead of ICE vehicle. Anything you do that stops someone else (even if you're not going to buy them yourself) is actively hurting the fight against global warming.

The only reason you would hurt the fight against global warming, is that you don't think it's as important as your reason for hating Musk. And that's a form of denialism. You're denying (if only to yourself) that climate change is going to cause death and destruction.