That was definitely the boiling over point, but it can certainly be argued that things like doritogate, Hernandez, Eurogamer, and others were already brewing what was to later come. Those things obviously happened before any of the ZQ crap.
Technically
anything "can be argued". The existence of Bigfoot and chemtrails "can be argued". It's disingenuous to try to handwave away the fact that virtually everyone agrees that gamergate as a distinct phenomenon kicked off with the Quinnspiracy Theory, and that the core of gamergate from the start was drawn from people who got a big emotional kick out of punishing a woman for corruptly inserting herself into "their" games industry, based on the provably false manifesto of one psycho ex.
Even if the Quinnspiracy were true, as opposed to requiring time travel, it would not be anything a rational adult would care deeply about. So one person gets arguably undue exposure for a free indie game, so what? That's not an ethics breach on the scale of a of major gaming company demanding good reviews in exchange for preview access and advertising revenue, say, to pick one kind of issue which had been going on for ages beforehand and which the gators didn't lift a finger about.
Do the math. Gators don't give a damn about ethics in games journalism, until an excuse comes along to attack a woman for being an evil, sexy seductress to get ahead somehow in gaming. Does this support the claim that it's really about ethics in game journalism? No. Does this support the claim that it's about femininity, sexuality, feminism and young male gamers' resentment of those things? Yes.
That was the core group who got the ball rolling. Any pretence that this was a grass roots consumer advocacy movement came along much later and was a story cooked up by that core group.
This one is always funny to read. Moot banning talk about GG on 4chan (along with neogaf, r/games, and pretty much everywhere else) is one of the key factors that got everybody riled up. You know?... all of those social media sites colluding together to keep people from discussing something? You revisionists have turned that into "GG was too toxic/violent/whatever for EVEN 4CHAN OMG!!!!", when the truth of the matter is that all of those community leaders buddied up to protect and whiteknight the poor helpless zoe, which alienated a lot of people that simply wanted to discuss something that was obviously a popular topic.
Nobody wants to be a breeding ground for the sort of slime who send death threats and rape threats to women for being feminists. There's a fairly select list of people so vile that 4chan punts them, and I don't think it's an error that child molesters and gamergaters are two of the few who make the grade.
You are not a victim if you are part of a group that nobody wants to associate with for good reasons.
If they had just let it be it most likely would have fizzled out in a matter of days and literally nobody would give a **** about it anymore.

...and the victim-blaming begins. It's
your fault you can't go on the internet without attracting massive, organised harassment, you made them kick us off 4chan, if you hadn't done that none of this would ever have happened! None of it! It's
all your fault!.
It's not really surprising. By definition gamergaters are a self-selecting group who take no responsibility for their actions, because those who take responsibility for their actions already left.
Discussion moved to 8chan and other places. So? What do you expect to happen when nearly every site simultaneously decides that a topic is not to be discussed? And at this point there was nothing "anti-feminist" about it. People were pissed that posts were getting deleted by the thousands and discussion of the zoe post was getting banned everywhere. Or to put it another way, people were pissed about coordinated censorship and blatant cronyism.
You think you've got it tough? Try finding a venue for a meeting of NAMBLA or the KKK! They have a really tough time what with all the coordinated censorship and blatant cronyism. Or possibly well-informed repugnance. You say tomato, I say tomato.
That has obviously been a part of it, but it can be easily proven that 2 out of 3 of them deliberately inserted themselves into the whole thing on their own and were not "focused on" before that.
Yup, roll on that victim blaming. They
deliberately inserted themselves, they wanted the death threats and rape threats, gators were helpless before their sexy female wiles, gators are the real victims here! When will these evil women stop making people threaten to kill them? When oh when? Only then will this madness stop!
Everything starts somewhere. It's not like people are just ignoring damning evidence of bigger happenings while explicitly targeting these poor helpless feminists. If bigger things, or things about bigger players come out you can bet your butt that GG will jump all over it. It's laughable to think otherwise.
Yup. Any minute now they'll be boycotting EA. Any second. It would be laughable to think otherwise. Gamergate isn't just about an excuse to work yourself into a frothing hatred of women and feminists and feel like a victim, no no! Gators are 100% ready to stop buying any major video game franchise the second they uncover evidence of unethical behaviour. Just you wait.
It's laughable to think otherwise.