So, if I gave you the impression that I was arguing that all the people who left religion turned into white supremacists, that's definitely not what I was saying. I'm someone who left his church, and I run a support group for others who've done the same. Most of us are liberal.
You said you didn't follow any of the links. If you have time, please do, because my arguments incorporate them by reference. If I had to summarize them all, the article would have gone from a four minute read to a fourteen minute read or longer.
A really important point in this whole discussion is just how much ideas that were once relegated to white supremacist websites and literature are now mainstream on the right. Many conservatives may not even be aware of the provenance of some of their favorite talking heads' new obsessions.
So it's not so much that people are leaving religion for white supremacy. It's that some ex-religious people are being drawn to the alt-right, while many White Christians who otherwise wouldn't have anything to do with skinheads or neo-Nazis are nevertheless being radicalized as their preferred political party and media outlets increasinly promote ideas like The Great Replacement.
(P.S. the NYTimes also has a piece today on this topic https://www.nytimes.com/2022/05/23/opinion/birth-control-abortion-roe-v-wade.html)