And Feminism is now considered a Very Bad Thing by large chunks of the internet (I still like it, but I see/understand it differently to how most seem to).
It's hated for two primary reasons by my view:
1) Some of the newer third wave stuff often associated with Tumblr has gone a bit too far the other way and started to push man-hate, and they're so loud and vocal that they've managed to give the illusion of hijacking the entire movement, which is moderate and supposed to help men as well as women (by for example changing the image of feminine away from something to somehow be ashamed of)
2) Younger generations are less keen to associate themselves with the sins of their fathers i.e. historical misogyny and privilege. As they were born into a world where equality is encouraged and we don't have so much of an indoctrination into the old patriarchy, they feel that those who tell males they're privileged and should be mindful of feminist issues, are actually trying to oppress men and make people feel guilty for being born with the wrong genitals.
Sadly, this has manifested itself in quite rampant hate towards all things interpreted as feminist, which includes anything aimed at females or featuring a female heavy cast (Ghost Busters). One could rightly argue other factors (like whether Ghost Busters is crap regardless of gender) but I do think it gets silly sometimes as I do see a heavily anti-anything-that-smells-feminist bias out there at the moment.
As always I think both sides are simply human and have their own worries and issues of defensiveness. But at the moment are more likely to dehumanise and attack each other, unfortunately, or go on mass sabotage efforts like this.