[punky]

You're putting too much store by ideological differences. When we have May Day violence, how much of it is by true left-wing communists who want to fight capitalist targets? And how many are actually right-wing football hooligans and thugs, who have just turned up for a ruck?

Also, although an extremist Shia, might refer to a Sunni as a heretic, and visa versa, doesn't mean people won't conveniently forget this to fight the common enemy. Who does a Shia hate more, a Sunni or an American? Iran is a charming country, filled with delightful people who like to chant "Death to America" during prayers. All of them. Spurs and Arsenal (probable exception of you) fans will team up together in pubs at England matches.