Some people need to justify a very difficult situation as normal. It helps reduce the anxiety and mental pain of the alternative. It's a defense mechanism. We see it regularly in society.
Unfortunately it makes it that much harder to fix the problem. Now we have to fix the problem and convince the deniers that it's a problem . Which is close to impossible since the more evidence they see the more they will try to normalize it.
My point is that climate change will happen regardless of our efforts, even if we get the current situation under control.
I'm not worried because earth and life will be fine despite our trashing the planet. However to claim that things are extraordinary discounts historical records, even back a few million years.
Unfortunately it makes it that much harder to fix the problem. Now we have to fix the problem and convince the deniers that it's a problem . Which is close to impossible since the more evidence they see the more they will try to normalize it.