So now we'll find out whether this platform is choosing to deplatform this particular speech, now that it's more clear that they're under no legal obligation to do so.
I don't really blame them if they are. The risk:reward for offering essentially a free service to take legal heat on something this "hot" seems like a bad tradeoff for github. Seems like the kind of thing better hosted on some financially fire-walled shell company's website where any losses from a protracted legal battle can fall off into oblivion.