I see your point about the social aspect - going to the pub and all pointing yourselves towards the same thing...
However, when you get england flags hanging out of every hang-outable thing there is, it just looks over the top. Walk into Tesco, you're immediately hit by this wall of England-ness.
I don't mean to disrespect football, or genuine football fans in any way - nothing wrong with having something to support.
But most people don't - advertisers and - it seems - the whole world shoves it in your face and just expects you to go wild about the world cup, just because you're from england and it's the "national" sport.