FROM pitch raids to mass brawls and death threats, Serbian hooligans could create carnage when they descend on Qatar for the World Cup. Die-hard groups of hooligans are intertwined with football in Serbia - and they are known for ruthlessly attacking players on the pitch and storming opposition stalls when the match turns against them. 12 Balaclava clad Serbian fan Ivan Bogdanov gestures towards riot police during the Euro 2012 qualifying match Credit: Getty 12 Serbian riot police officers push back fans during a derby in Belgrade Credit: AP:Associated Press 12 Serb ultras are expect show up in force at...