Vainamoinen: If you, as an individual, consider yourself part of THIS group, then the article can not in the least be insulting to you. These lines should also be put in the larger context of gamergate and its 'demands' to video game journalism.
Who are you to decide what should or shouldn't be insulting to me? Her article was full of insults to gamers (just like the other 'Gamers are Dead" articles). And even those jibs that don't apply directly to me, I have the right to be outraged about them anyway. If someone starts spewing out racial hatred, I feel I have every right to respond in defense of my friends.
Furthermore, I disagree with your whole premise. You equate gaming culture to "mindless consumerism" merely because you do not like the choices some subset of the gamer community makes? I personally do not play the Call of Duty shooters, tried MW2 briefly, not my thing. This doesn't mean those who buy it are mindless. I've met maybe people who love various games in the series. They have passion, they enjoy it, their love for the genre is far from mindless. I've found them to be critical of some releases showing they are a discerning audience. Thus, I find your comments insulting to my fellow gamers.
Another thing I find insulting is the way you just assume I have not read the article as a whole (or even at first just assumed I had not previously read it). Just because I disagree with you is no indication that I have faulty reading comprehension. We are all each entitled to our opinions, and my opinion clearly differs from yours.
And just because someone uses "us" or "we". I've known enough people who consider themselves a "True xxxxx" while spouting out their hate of the rest of any given subculture. Frankly, I can give a rat's ass for these people and their self-claimed more enlightened attitudes, and as such feel I have a right to exclude them from my own definition of, for instance, "Core Gamer".
I don't have a problem with people buying Call of Duty or anything from Blizzard. I don't have a problem with people supporting Steam and Early Access. I don't have a problem with people attending E3 to see the early trailers. I respect their rights as true gamers to spend their own personal funds as they see fit because they are enjoying what they are doing. To me, these are also real gamers. They are not mindless. They each have made choices and financial sacrifices for their hobby like I have. Just as I'd consider a feminist or LGBT gamer who supports only titles which have a minimum level of inclusion. As long as they are not spewing hatred for the rest of the community or telling all of us how we are all "doing it wrong".
Where I do have a problem is with people like Leigh Alexander and you where you feel its necessary to throw out insults at your fellow gamers. Especially Leigh Alexander and her hatred for white men (you can see her bigotry from her tweets), but also to you and your disdain of the "mindless core gamers". We are all gamers on some level, but if you want respect (and games journalists should be coveting this due to their positions), then you need to treat your community with the same respect.