They really do underestimate how little women give a shit about nerd culture. At the risk of sounds like Cannibalistic Humanoid Underground Dweller, most women don't give a fuck about a lot of things unless it's popular among men, so that liking it themselves will make them attractive in some capacity (purely survival, find a mate mentality) or at the very least give them a bunch of attention ("Look at me! I'm a rare nerd girl, look at me!") Or, to echo the feelings of my Father and many other Fathers, they hate that it bring us happiness so they seek to destroy anything that will take attention away from them.