With European names, I also saw plenty of times when wrong genders were assumed, but those things shouldn't be taken as malice. It would be weird for an adult to use that a a means for insult, so why not assume it's an honest mistake?
The same insult doesn't really work on men in that same setting, since we're not really a minority. So we're more armed against someone calling us "she".
But I can imagine it's hard to have to justify yourself every time for being a woman. Yeah that sucks, a lot of jerks out there and not much to do about it.
I stand corrected.
So against that background, it's entirely understandable that they react more emotionally also to accidental mistakes. That doesn't mean overreaction is a good idea, but it's a backlash against a long history of having their identity denied. If we don't like the backlash, maybe we should work harder to address the original hatred that it's reacting to.
I'm male, and sometimes people outside my native country misread my name and read it as the feminine version of it. I've answered phone calls and gone to appointments where people were actually expecting a woman, not a fully grown man. That's people being silly, not rejecting my identity.
But I don't want any part in this discussion, like the OP in the article, I'll keep using "they" to refer to people on the internet.