It's not a theory Mark.
Your pitiful supporters like violence, hooliganism, vandalism, and fighting. They like it a lot.
I haven't made this up.
From your pitiful opening post to this, your bigoted rhetoric has focused on virtually only one set of supporters and you have ignored all reports/facts indicating that it is, as usual, a very small minority (in the case of all supporters of countries that have been involved), often it has been under extreme provocation and that often conservative, normal, supporters have been caught up just trying to get away from attacks / police action.
I suppose it's to be expected coming from an Irishman living in Australia. With the potential for anti-English bias to be indoctrinated from birth in both countries but your desperation to make mud stick is extreme.
Let's be very clear, I'm no fan of the drunken English hooligans that have been causing damage / spouting abuse / assaulting the police / fighting. Pity it's not China and they could all be shipped off somewhere and re-educated'.
I'm also no fan of the 'English drinking culture' which is the cause of so much of young people's social issues in the UK and that spawns much of this anti-social behaviour, but your lack of perception and failure to consider the sheer numbers of English supporters over there (and therefore the very low % of bad apples will still generate a substantial figure) and the behaviour of the hooligans of other nations involved in anti-social incidents in France, plus your continued stance of "your pitiful supporters' without any qualification, is mystifying.
You shouldn't have started this thread, your reputation is taking a hammering the more you continue your anti-English diatribe.