I don't think the GP was saying that they are, only that stupidity is not the driving force. They even said as much at the end:

>Sure there are probably stupid people that don't understand but they are not driving so to speak.

For example, we're all aware of Einstein's flub wrt quantum mechanics, a mistake that was grounded in his religious beliefs. I think you'd have a hard time arguing he was a stupid man.

I wouldn't call them stupid. Though when irrational and unreasonable fear of a slippery slope result leads a significant portion of a population to deny the obvious to their detriment, I'm comfortable calling that a stupid action.