next year when the Trump tax cuts expire
It's worth repeating again that the middle class Trump tax cuts expire next year. The Trump tax cuts for the wealthy have no expiration date and are permanent.
Also, they're not "Trump" tax cuts but Republican tax cuts, but at this point the distinction doesn't really mean anything anymore since Trump has completely taken over the party.
The core is about change. To accept climate change means they have to make changes to their lifestyle, and they don't like having to change. Beyond that, it's rationalizations and bad faith arguments from the usual grifters and corporations layered on top of that to justify the position they chose emotionally.