The mistake comes with the very first arrow. You don't have to believe in "science" to be a nerd. You have to be passionate about technology. And that's a very different thing.
Most of the scientists I know can spend years of their life pursuing a hypothesis that turns out to be wrong, shrug their shoulders, and dive back into it. Technologists are all about output. If it's not outputting, you have to give up and seek a different avenue. Scientists (except the very famous and successful ones) tend to be humble and curious. Technologists less so.
You are confusing “nerd” and “geek”, historically.
Both terms are overloaded, because neither has been used with any consistency. Like the long forgotten trekkie/trekker divide, it was a way for some people to feel superior to other people, but the lines were never clear.