I think what they mean is 'you lost the war' and the are not saying that they won it alone and on their lonesome.
Pejoritive remarks seem to be the stock in trade of most football hooligans, it's just that these animals seem to have raised it to an art form.
The people concerned were easily identifiable on the newsreel shots I saw, so they should be immediately arrested and returned to Merrie England, where they should be charged with bringing the country into disrepute. They should also take their little inflatable Spitfires and insert them in their fundamental orofices while they're at it.
I am as usual, disgusted by the antics of these tossers, and feel sorry for people who go to these countries afterwards for a holiday, and get treated badly as a result of the behaviour of the footie arseholes.
Giok