"Nerd culture" hasn't absorbed any part of "normalfag" culture, or vice versa. In the 80s and 90s, if you were a nerd, you kept that shit quiet unless you wanted your ass beat or to be mocked relentlessly. Those who actually stepped up and said "I'm a nerd and I'm not ashamed of that" were ridiculed to no end. Look at the reaction to the crazy bitch who wore her Starfleet uniform to the OJ Simpson trial.
So people kept that shit quiet. That is, until circa 2004-2005, when Battlestar's remake hit the big time, and suddenly it was cool to like scifi again. Batman Begins, Fantastic Four, and a buttload of other capeshit movies started hitting mainstream. Let's not forget that Spiderman 3 was the biggest-selling movie of all time for a while there. Then you've got Avatar and Game of Thrones, suddenly being a nerd is cool.
The common misconception is that this made all the normies start jumping on the bandwagon, but the truth of the matter is, all the nerds who were in hiding since the first time they touched themselves to Picard's bald head were suddenly okay to come out into the light of day (well flourescent bulbs but you know what I mean). What you would call "normalfags" are really just nerds from every spectrum of the nerd continuity stepping up and saying "Hey, we aren't ashamed of what we are anymore."
The unfortunate downside of this is that the majority of you sick fucks came along for the ride. Bronies, furries, people who watch shit like Supernatural, anyone who buys into the cancerous CW capeshit shows, etc. People so desperate to be a part of the mainstream that they will literally buy or watch anything to fit in.
It used to be, you watched something like The Adventures of Lois and Clark, you kept that shit to yourself, because anyone you told that to thought you were a fag. Now you've got a whole board, fuck, a whole website to come circlejerk about it on.
Inclusion is a big attractant. It's why the SJWs can continuously replenish their 1/2