Thanks for posting a good link
There is some serious stuff to digest here, but the basic story sounds good.
We know it wasn't a continent-wide catastrophe, because the flora and fauna has survived (mostly) - sounds like the American Mammoths had a bad day, and the Clovis culture was damaged, forced to move away, or destroyed.
Let's continue to treat this rationally. We might even find some areas we can agree on?