Disruptive changes challenge all disrupted species; most of them flounder or go extinct.
We are not relying on a fallacy, and announcing that “unnatural = bad” is one doesn’t beg for proof, it grovels.
As to climate modeling, its challenges are in the weeds; it just isn’t perfect. But in large, it is spot on. Offering off-hand insult to the folks who have spent careers shaping and refining climate models is beneath any respectable human being.