I can't claim that this is an original thought, but the interactions I have had with folks at all ends of the political spectrum have led me to believe that progressive ideology is a religion.
You can't reason with these folks without tantrums and attempts to shut you down. They yammer to each other about how evil and misguided people who disagree with them are and they feel morally justified in doing whatever they damn well see fit because they are convinced they know better.
If you disagree with them there's no dialog - they just try to kick you to the curb. They operate on faith in their principles and are unwilling to discuss common sense and logic .... hallmarks of a religion.
How else to explain the approach to the scientific viability of climate change? There's far, far less conclusive evidence for climate change than there is for evolution, which we still call a Theory. Yes, a hardcore progressive equates those that question climate change with Holocaust deniers. No logic explains that reaction - it's a religion.
It all reminds me of discussions I used to have with "born-again" folks while stationed in Arkansas. Their absolute, unshaking belief that their way was the only right way was disturbing to my old pragmatic self. A Jew who has tended to the poor his whole life? Going to Hell. A Buddhist that runs an orphanage? Going to Hell!
Not to overstate it or look like a wingnut, but folks like that worry me. When a group of folks are so sure of their positions as a matter of faith, they justify themselves doing some pretty horrific things because they effectively dehumanize the opposition.
You see this time and time again throughout history. The Inquisition: The Catholic Church justified the burning of Jews, torture, and all sorts of depredations because they had faith that they followed the way of the Lord and that justified anything.
Nazi Germany: Jews were not people, so camp authorities who were good family men and loved their children routinely tortured and gassed Jews and Gypsys.
There are some, some right-wing religious nuts who potentially qualify under my theory but most of the progressives in pwer certainly do. And what to do? They're indoctrinated.