AI and bitcoin, regardless of what one thinks of them, have made negligible contributions to climate change. It is below the noise floor relative to other major industrial and commercial sources of atmospheric CO2.

Virtually all of the current conditions were in motion before bitcoin and AI were even a thing.

No, excessive fossil fuel use is the cause by an immense margin. It's completely dominated by commercial shipping (boats), followed by planes. Then I think it may actually be gas from cattle before cars. Bitcoin and AI are so recent and still relative to everything else small.

I’d put people who have maliciously and intentionally undermined action on climate change first. Donald Trump comes to mind.