Tumblr isn't representative of feminism or humankind for that matter. And a collage of Tumblr posts cherry-picked for their awfulness isn't even representative of Tumblr itself.
[0] Both many prominent Twitter Feminists and Tumblr SJWs cling to the idea that if you're privileged, you can't criticize the oppressed (even if you're not directly oppressing the oppressed in question), so if you're misunderstood as doing something that opresses the oppressed they can start a campaign against you so you lose your job, etc, but you can't answer in the same tone. This is to say, I'm being a jerk for using the word "unhinged" when I don't have any apparent mental disorders.
Some people are Assholes. Feminists are people. Ergo, some Feminists are Assholes. It doesn't say anything more about feminism than it does people in the checkout line at the grocery store.
Here's another feminist who also did the same (and was eventually made to resign for it, thankfully): http://en.wikipedia.org/wiki/Mary_Daly
The vast majority of tech industry feminists are postmodernists.