Not sure about the most stupid fans but Manchester United have to take the prize for being the most obsessed with other clubs and their fans.
Goota be Spurs fans With stuff like "Barca could learn a thing or two from our sublime football in the first half of this season" and "Spurs the only london club to be top at Christmas" augmented by Ensil and HIAG, Power shift Hahahahahahahaha I told ye spurs wouldn't finish above sea level months ago.