Jon - They say that Rugby is a game for hooligans played by gentlemen.
Also, that Football is a game for gentlemen played by hooligans, that Cricket is a game for gentlemen played by gentlemen and that Ice hockey is a game for hooligans played by hooligans.
I suspect that large football stadia are more plentiful and are a more handy battleground. Also that the vast majority of fans just want to go and support their team. With their family if they're lucky enough to have a family that's interested.
A lot of the recent trouple between Scottish fans is about religious sectarianism, not about football. Between Italian fans or Spanish fans, it's political.
I can understand it even if I don't condone it, but what really troubles me is that it's starting to happen at test cricket matches. Unthinkable.