As much as I shouldn't condone anyone being a jerk or a snob, I can understand the anger a lot of PC gamers have towards console developers and their audiences. The PC has had a long, rich history of games that took full advantage of its own unique hardware. Games that have had a massive impact on video game history and, to this day, are still remembered fondly for all the things they have accomplished. Adventure, strategy, role-playing and all kinds of games of indescribable genre that just wouldn't have been feasible on 8 and 16-bit consoles with their simplistic 4-8 button gamepads and limited-storage cartridges.
The anger comes from the industry's decision to compromise the PC's unique advantages (interface, memory, storage and up-to-date graphics technology) by taking games that normally would be PC-native titles and developing them for consoles that lack them. And it's not just graphics and controls that suffer. The worlds have to be smaller to fit within limited hard disk storage, often segmented and stripped of content to fit memory limitations. These same issues also affect AI, character interactions, physics, environment triggers, and other elements that bring a game closer to being a living, breathing world as opposed to a prettied-up version of Dragon's Quest. It's especially troubling when it happens to an already established franchise that did do things the PC was uniquely capable of, only to have these elements stripped away from the once eager player. (ex: Deus Ex: Invisible War, the F.E.A.R. sequels)
The Elder Scrolls is a good example of a series that has no business being on consoles. Why would you want to make Skyrim for XBox 360 or PS3? You could do so much more with such a game by making it PC-native. Sure, it wouldn't make as much money, but it would age a whole lot better.
So, as you can see, it's no surprise that PC gamers have become defensive in this day and age. Because their medium is rapidly becoming negatively affected by the current industry's multiplatform development models. And it's not just PC gamers who are upset. Console gamers are also being shafted by today's consoles' attempt to be more like PCs. Wasting development costs and hiking up prices only to make consoles more unstable and crippled further in terms of hardware (there's only so much you can spend on everything else before you have to make the "playing games" part use cheaper, more primitive technology with less memory and graphical capabilities).
We can put as much blame on the consumers for the "PC vs. Console" war as we want, but the real culprits are the publishers and developers who compromise the platforms they claim to faithfully support.