But Github here is in the position where they are the only external party that could do something about this, because the code is hosted on their site.
> ... Im sure many people don't want GitHub to start arbitrarily banning projects because of a random set of beliefs they have
It wouldn't be unprecedented and it wouldn't be arbitrary. Google Code, for instance, only allows open source projects to be hosted with them. From what I can tell about Github, they allow any license. Doesn't mean that they can't change that policy.
Sure, it's easier to do nothing. But they alone could do something. And Facebook will get the goodwill they want from this without much kickback because nobody does anything.
> ... Im sure many people don't want GitHub to start arbitrarily banning projects because of a random set of beliefs they have
It wouldn't be unprecedented and it wouldn't be arbitrary. Google Code, for instance, only allows open source projects to be hosted with them. From what I can tell about Github, they allow any license. Doesn't mean that they can't change that policy.
Sure, it's easier to do nothing. But they alone could do something. And Facebook will get the goodwill they want from this without much kickback because nobody does anything.