It’s been repeated enough and hysterically so, to the point of causing mass formation psychosis, just like they did with COVID fears.
Reading online comments on liberal forums has convinced me of that. There really ARE people who have made this myth the overriding priority of their lives.
Our local weather reporters reaffirm the need to “stay on top of the weather so we can best be prepared for the dangers of climate change”. Four times a broadcast.
It's worse than that. The majority of the MSM has made the "climate change" myth the overriding priority of their lives. There are numerous politicians doing the same. Global warming is of course real, you'd have to ignore satellite temperatures since 1979 and that's not justified. There are adjustments to satellite trends but the trend is definitely up. There is no question the rise from 280 ppm to 420 ppm and counting is part of the cause, and almost all manmade.
But the satellites don't tell us anything about the worse heat in the 1930's. There were colder winters then so often you will see them use the "average" temperature particularly the annual average. No question that there were worse floods in the 1970's and other decades. The 1844 flood is still the largest in US history (on the upper MS and MO rivers). The 1862 California flood is by far their worst flood. The June 1917 heat wave was by far the worst ever in So Cal (115 in Santa Barbara). EF-3 and higher tornadoes are in decline. There's also a likely decrease in extreme wind although it varies a bit by location.
The only deleterious impact of global warming I can find is hurricanes. There are fewer but the average hurricane is stronger.