Where is the direct connection to video games and GamerGate?
The threat is obviously from an anti-feminist. I read that as if he would be making the same threat to any other feminist. Sarkeesian just happens to be the feminist speaking at the time. The threat mentions killing random feminists that have no connections to video games as well as how feminists have ruined his life. The threat lacks specificity towards Sarkeesian, and
instead it seems as if it is in reaction to the wider ideology of feminism. (Edit

oster below spent a bit too much time after missing my point. The threat lacks a specificity towards her that couldn't be applied towards any other feminist. I think the reference to fantasizing is the writer telling us what makes her a feminist. Taking this as a serious threat; I would be worried about this individual near any feminist - not just limited to those involved in video games. Wow.)
She did the right thing by canceling. I would have as well.
A couple of posters have noted that Sarkeesian said the threat directly mentioned GamerGate. Is there a quote or link that I may have missed?
I hope they find the emailer and put him away.