Too radical is in the eyes of the beholder. Most of the most intelligent people I know, people who rather carefully analyze their own beliefs, tend to have at least a few things that they are extremely outside the Overton window on. It's not particularly hard to see why: if you apply even a surface-level analysis of the world around you, a lot of stuff is "we all believe X because we've always done X that way".

On the flip side, there's plenty of just very dumb people out there. I play enough games that involve VOIPing with others that I can confidently state such.