I'm sorry, what?
Yes, it looks like Github has been pulled into a fight not entirely related to their initial mission. But that's how principle flows, you never know when the free flow of information will turn into a larger fight.
I very much hope that they, and whatever networking partners they're working with, see this through. Because it's bullying bullshit by the Chinese government, trying to make people shut up because that government doesn't like what they are saying. GitHub is a company in America, not in China, and I hope they and their partners have the principles to stand up for the right to say what you think in America. If, by the magic of technology, those statements end up readable somewhere else, so much the better.
Because if GitHub folds to this sort pressure, that pressure will just move on to the next site willing to host something that maybe the Chinese government doesn't like.
You can make your accomodationist crap sound as reasonable as you like. It still amounts to giving in to censorship, and letting other people tell you what you can and can't say. I don't admire that, not one bit.