I also think that a big fault here is the fact that the notion "All cisgenders are assholes" is the common opinion within the people who don't identify as cis. Cis people are immediately judged badly simply because they are cis.

I will suppose that the oppressed trans (OT) are like that because of some reason. Then the oppressed trans is presented with two cis: one is cool with OT's well-being and is willing to help, while the other is actually being a flaming paper bag of shit to non-cis. From what I can gather from KYM (for me not being a Tumblr user), the OT would then proceed to be a douche to both cis people because one of them smelled like The Human Torch's toilet and let the smell pass on to the other.

Now, because no one used Febreze, the only thing OT and friends smell from the rest of the cis are crap to the point that they would refuse to be near the majority of cis – even though some took a shower, and would neglect them instantly. OT is judging a book series by the cover of the first book, and OT's friends are judging the series by what OT can and won't infer from the cover. At this point, OT is just as smelly as the shit cis because it's the only thing OT observes. Yet OT will deny smelling like it because they are too busy smelling others, and wouldn't smell their own scent and realize that they need a shower.

tl;dr version Don't judge a book by its cover, or the author will make an autobiography of you based on the shirt you're wearing.