Holding unorthodox beliefs in the face of overwhelming evidence to the contrary, and throwing out centuries of repeatable experimental and observational evidence in order to do so, very much equates to stupidity.
So global warming believers and religious people are stupid? Well, that makes it a bit easier, since now we can dismiss the majority of the world as possible authorities on anything.
If there is overwhelming evidence against global warming, then to believe it is stupid.
If there is overwhelming evidence against a religion's teachings, then to believe it is stupid.
If there is overwhelming evidence against anything, then to believe it is stupid.
If you disagree, give an example of something there is overwhelming evidence for that is provably false. It can't be done, because the existence of overwhelming evidence is only possible if something is not false.
You seem to be criticising me just for the hell of it whilst simultaneously agreeing with me. Are you having some sort of problem?