Jaric said, that it is ironic to be criticized on racism and hooliganism by countries that practically invented both. While English media are exaggerating (just look at their reports about Ukraine and campaign they had before EC), the problem is evidently there among some groups.
But the problem still isn't in vacuum. English history is that of colonialists while Serbia was for 300-400 years under Turkish yoke. Who were, arguably, a different race. You can't justify racism but the historical context isn't the same for Western and Eastern countries and it needs to be approached differently.