This seems a little extreme. Do you really think everyone labelled a denier is dishonest, in that they actually know the "truth" and instead are choosing for personal gain to spread "lies"? Is there really no room for "misguided", or even simply "wrong"?

Here's the autobiographical note for the originator of the graph that's being skewered: https://stevengoddard.wordpress.com/who-is-steven-goddard/. He describes himself as a bicycle-riding lifelong-environmentalist who worked to get the clean air act passed. He says he never uses heat or air conditioning, and guesses that he has "the smallest electricity bill in Columbia, Maryland because I am very careful not to waste".

This isn't the self-narrative I'd expect for someone "aimed at sacrificing the future of humanity for short-term personal gain". Instead, he sounds like someone who genuinely believes there are flaws in the current version of climate science, and that a better approach is necessary to save (not sacrifice) humanity. What makes you so convinced he's dishonest, rather than a true believer with different beliefs?