Most of the deniers I know are in the Midwest. They’ve had “hundred year storms”, draught, and winter cold now for about 5 years in a row and it didn’t phase them. Finally this year they were blanketed in wildfire smoke (and in the 25 years I grew up there we never had smoke) - and finally some of them are starting to realize something is up.
Oh everyone else says it’s a thing, well nothing happened to me so it’s obviously fake.
but now that it is happening to them directly it might be worth looking into