What is up with the dividence of PC & Console gamers?

I had a short conversation with a few people about the whole 'PC Master race' and such. I dont really get why people divide up consoles gamers and PC gamers'. Yes okay sometimes PC can have better graphics and run faster but some of the best games ever made where for console only (Legend Of Zelda and such). I just don't really understand why it has divided up. Both PC and Consoles both do what the gamer wants, to play games on them, so why divide us up? I myself have a few consoles, including a Gamecube, Xbox, Xbox 360, PS2, Wii & a GBA. I also play on my PC sometimes. What do you guys think of this? Please do share your thoughts :D