Whenever I think I have discovered the limits of what SJWs will do, I find out something new, like trying to drive a girl to suicide over a Pretty Cure fic, apparently. I am glad you stood with her.
I'm glad I did too. I don't think I realized it at the time, but looking back, it did strongly color my view of SJW types such that, when I encountered "alt-right" propaganda (and I mean "alt-right" in the sense that MILO, Paul Joseph Watson, and Pepe memes were "alt-right"), I swallowed it whole.
I once encountered a video by The Red Elephants YouTube channel arguing that the Left's extremist rhetoric and constant lies are what is driving young white men to the "far right." I've seen this argument vindicated again and again in my short lifetime. One recent example that comes to mind besides my personal experience was when PewDiePie announced he was donating $50K to the Anti-Defamation League, a Left-wing Jewish identitarian group masquerading as a social justice organization, and then received a ton of backlash from his fans, resulting in him rescinding the donation and apologizing to his audience.
This video explains it best. I have no doubt that, were it not for the ADL's constant efforts to censor YouTube for "hate speech," people would not care if PewDiePie donated to them. But because the ADL has gone full SJW, people started looking into the organization and found that it had a history of financial corruption, partisan hackery, and censorship of dissent (in other words, your run of the mill SJW activities). No doubt, the ADL's activists are going to go cross-eyed and declare PewDiePie's fans to be a bunch of Jew-haters, driving them into the arms of those like E. Michael Jones, a far right Catholic.
Sounds like it was a Pretty Cure/MLP crossover. But your point stands. Since it was something so trifling that these fine folks get so worked up over. It is as if they had no sense of proportion, to act like this is some attack on them and then conduct themselves accordingly.
Actually no. It wasn't an MLP crossover. It was straight-up Pretty Cure fanfic. The story was written before MLP: FiM became a big thing.
Here's the story's TV Tropes page for the fanfic.