yeah, see, now, because you're angry, you're making an ass of yourself.
if you read the thread in its entirety, you'll see why we're jaded about a lot of what tumblr has to offer. for example, fictionkin and objectkin. those are silly and delegitimize the trans movement by taking away necessary attention to it, namely when fictionkin say they experience disphoria.
tribalism would be more along the lines of "believing everything you read on the internet". we know that tumblr is a hotbed of teenage attention-seeking, so that's why we have two threads to talk about social justice. the "worst", where we showcase the asses, and the "best", where sensible things are posted. we also have the "things" threads where we can post things not directly related to social justice. around here, skepticism is the norm, and most of us read everything with a grain of salt.
there is discrimination everywhere, of course, but baby steps. most humans are simple creatures who can only be bothered with the flavor of the week. 10 years ago in the usa, gay marriage would never have passed. then came civil unions, marches, legislation, and look where we are. progress is maddeningly slow, and most people don't even know the existence of asexuals, because it's misunderstood. what do we do? we don't cry about it, we tackle bigger more flashy issues until the populace can accept it, in a sort of positive trickle-down effect.
you've given us three sources, sure. two blogs and the huffpost. frankly, it's niche at best. i'm not saying it doesn't exist, i'm saying that people don't care because they don't even know aces exist in the first place. does that make them cold? no, they treat it like generalized rape. which it is. you wanna tackle the ace rape problem? tackle a bigger fish, like rape (of all kind and against all victims).
and unfortunately, with hyperbole being difficult to separate from the truth on the internet, yes, people who post do believe their issue is the single most important one. hell, most people find it hard to concentrate on two things at once (for example, abortion clinic bombings and gay rights). you get jaded after a while.
there, i believe i said all that should be said about your angry rant in a calm collected manner.