Patrick Michaels' essay is like trying to prove why the sun goes around the Earth. Or why gravity doesn't work. Or how the U.S. faked the moon landing. It doesn't matter what his arguments are: his initial premise is wrong.
The world has missed the opportunity to avoid serious, damaging human-induced climate change. How bad it ultimately gets depends on how much longer Congress hides behind political ideology, and religion to deny the reality of climate change.