You're asserting that no GG'ers have been involved in doxxing/swatting/harrasment?
Yeah, ok....
I don't know of any individual examples of people who were doxxing and SWATting people "in the name of GamerGate" who haven't been shown to be blatant trolls or goaded by trolls (like the ones offering game codes if they tweet atrocities)
That's not to say that there aren't people doing awful things like this under some kind of GG affiliation or affectation or whatever. There are going to be really terrible people in pretty much any sizeable group. The question is less whether or not there are these terrible people there (or, say, that there are terrible people who call themselves feminists) but whether or not the GG movement, momentum, communities it has fostered and passions it has inflamed is itself responsible for encouraging people to send death threats, doxxing, SWATing, etc.
I've read a lot of stuff from GG communities, and personally I got pretty tired of it.. there was a decent amount of variety there but still a big undercurrent of people who came off to me as immature, puerile, and biased as hell. A lot of chan culture that I may think has a right to exist but have never personally enjoyed. And a lot of people really ingrained in their bitterness and not really capable of seeing where the other side was coming from at all.
But would I say that it was an environment that fostered, encouraged, or (as I've seriously seen some people claim, no joke) benefited from terrorizing people with terrible threats? I don't think so. And I don't think I've seen anyone make a compelling argument for this. I don't think I've seen anyone even try to make a compelling case for this. All I've seen are people en masse assert it as fact. People who stand to benefit from it being fact.
For all the nonsense that happens in GG communities, you will be hard pressed to find someone who seriously wants this kind of thing to happen. Someone who is not only that vindictive and hateful, but so out of touch with their own interests. It's obvious that the presence of obscene harassment has completely taken over media discourse and has been exhibit A in the trial of public opinion. Every time it happens I guarantee you there are thousands of GGers loathing it, and doing what little they can to try to stop it (like the Twitter anti-harassment group that at least tries to report it as soon as they see it).
Some controversial people online who have been twitter spammed to millions receive threats, something that pretty much always happens, something that sadly is pretty much expected because you can't avoid reaching psychopaths in crowds of millions. That doesn't mean that their psychopathy is cultivated by nerd culture or whatever. But they were saying that about Elliot Rodgers so of course they're going to keep saying that now.