Even though relating the two mediums through biased takes and personal anecdotes is hardly grounds for the phrase 'War', I believe it is the symbiotic relationship the two have that is responsible for the hostilities. Historically, consoles by and large have been a distilled PC gaming experience. They eliminate most of the tweaking, customization and freedom that made classic PC gaming thrive. They then packaged that product into a more marketable distribution. When the publisher/developer has a bit more control. They can then spend more money on marketing that package to the lowest common denominator instead of trying to appease the more discriminating classic computer geek.

This cycle continues for a few generations and comes to dominate. At some point the that product makes it way back to PC gaming (which in the mean time has since moved on to different types of games that simply don't work on consoles). When compared to status quo on PC, the games just don't feel the same. Corners are cut and compromises made for the console audience and play style. And while that's unfortunate, it reaches the widest audience and makes the most money that way.

Luckily, there has been a rise of several new indie platforms that cater to this audience that feels ripped off, allowing them to revitalize gaming on PC and give it a feel many PC gamers haven't experienced in a decade. While this helps, there's still a feeling (even if irrational) of betrayal and disregard for the fans of PC gaming that allowed console gaming to exist in the capacity it does today. The case for this is seen with taking classic PC IPs and recreating them on consoles and then running the series into the ground due to the way the lowest common denominator consumes media. Especially when you see some mod that was popular on PC as a custom setting for a game. Some studio will then take that concept that is poplar because of it's success on PC and then distill it for console play-style. At some point, it will return to the PC with a big budget and high production values, but still feel empty due to the way it's ported.

I guess the moral of the story is that while, comparing things to the past it may seem bleak for PC Gaming. Looking to the future there are plenty of new and innovative things on both PC and Console to look forward to.

TL;DR - When you take a square peg and then round the corners off to make a circle, you find that putting that circle back into the square hole doesn't fit right and feels wrong.