Here's a hint. One side is threatening "the greatest school shooting in American history"
So I think we can safely assume that there are thousands of people actively identifying with the #gamergate side.
Do you seriously believe that thousands of people endorse the notion of school shootings?
Sorry, that is just ridiculous and you should get your head checked.
Randi's post does not have any proof linking #GamerGate, an amorphous hashtag to threats, or even casually proving that "GamerGate supporters" are the ones carrying out the threats. It's just an opinion.
It'd be pretty easy going back in one's twitter timeline to make that determination, would it not?
no matter how deeply you or I may respect the author, he doesn't seem to have any evidence for your claim, either.