IIR, it was known in the 1980's that the American southwest could go through centuries-long phases of extreme drought - which resulted in the great majority of the local Native American populations either migrating out of the area, or dying off.
But that did not stop Marco Rubio from literally using the phrase “climate cult” to describe those who believe in the obvious evidence of global warming:
https://thehill.com/homenews/administration/5738648-rubio-eu...