I was a big Sony fanboy until I got money to buy whatever console I wanted so I started to enjoy the Wii U, and now love Nintendo when before I couldn't care less. Will probably do the same thing with the XBox One. People spend a lot of money on a console then need to keep constantly justifying in their mind why the heck they did it in the first place. So the fanboyism starts because they want their console to be the best. It is actually a normal thing and an understandable one. It also brings funny situations like the console wars, so I think it is not a big deal most of the time.
You're a good person for being bothered with the insults but not doing the same thing. Just try to enjoy your games and filter the bad things you see online. You know better than them.
