Good essay.
It really comes down to A) Those who don’t agree with MANMADE global warming and/or B) Those who believe the Bible, where it disagrees with science theory.
I think one can still be a Christian without believing God literally made the Earth 6000 years ago. In fact, there is a lot of debate even among Christians who interpret Scripture literally or figuratively.
However, the Atheist Left makes no distinction between them and tries to impose the “Flat Earth”, “Earth-centric” believing view on ALL Christians, which is simply not true.
I have never seen any claim in my bible that the earth was made 6000 years ago.