The problem actually was started by Maggie Thatcher. She needed a way of discrediting the miners, so got a report which said that the CO2 from coal stations was causing global warming. After that, if you wanted funding, you couldn't get it if you didn't go along with the prevailing views. And after that, anyone who had the courage to question the normalised view, was shouted down - with a vengeance.
I can't remember which English university was found to have altered the climate figures to show a hockey stick effect, but that was the point when people stopped saying the man was causing global warming, and then started to say we were experiencing climate change, which then became to mean that climate change was man made.
The problem is, that once people have certain mind set, it's very difficult to get them to alter it. If the Romans could make wine in England 2000 years ago, it shows that there have been temperature rises well before modern industry ramped up the CO2 output.
What set me to questioning it, was a friend who looked at Al Gores graph showing CO2 output and temperature rises that were in sync, and said that any decent scientist would know that there should be a time lag gap, rather than a straight correlation.
And I can see your argument EFL, but thinking Cholera was airborne was just ignorance, whereas fiddling the figures to achieve the results you want is pretty much corruption.