jefequeso: Apparently.
I suppose I could see how a hyper-sensitive person might be offended by that. Although I think it's hilarious.
toxicTom: Someone care to explain the joke to a foreigner?
Otherkin are people who... well, think that they are, for all intents and purposes, not entirely human. It's something I don't really pretend to understand, so Google is probably going to be a better help there. tl;dr: some people think of themselves as not human, and prefer to not be referred to as such.
The problem is that the joke could just as easily be interpreted to be referring to transgender people. Transgender people are people who identify as being, for lack of a better phrase, trapped in a body of the wrong gender. As such, they try to take steps to correct the error by methods such as hormone treatments, crossdressing (which is its own thing, but that's a whole other can of worms), and in some cases surgery. They also prefer to be referred to as a member of the gender they identify as (i.e. a transgender person born male who identifies as female would prefer to be referred to as a female). Thing is that society tends to kind of be dicks about trans people by way of violence (google 'trans panic' if you want to depress yourself), 'conversion therapy' similar to what gay people undergo to try and 'cure' them. The thing in particular that the tweet seems at first glance to refer to is how some people intentionally refuse to refer to a trans person as a member of the gender they identify as, which trans people get upset about since it comes across as trying to insist that they are making it up and shouldn't be encouraged or something like that; on a scale of disrespect and insult, it's up there with trying to tell a gay person that they are in fact straight.
jefequeso: Also, there's a difference between saying "that joke might have been in slightly poor taste" and saying "you are obviously transphobic, let's spend the next few hours screaming at you on Twitter."
Agreed; still, it was in rather poor taste, to say the least; I'm not trans myself, but I know a good number of trans people, and they get that kind of shit way too often for me to find anything referring to it funny. Glad to hear he apologized, if nothing else, for all it's worth. Kind of odd that hasn't been the end of it, unless he stuck his foot in the mouth with the apology or something; you have a link on you, perchance?