I think it was Alexander Haigh, the US Secretary of State to Ronald Reagan, who likened the Falklands War to two bald men fighting over a comb. That was thirty years ago, and it would appear that little has changed since. Argentina have lately been bleating on that the Malvinas should be returned to them (although it's debatable as to whether the islands have ever been Argentinian territory), while David Cameron has been using his presence at the current G20 summit to deliberately wind the Argentinians up over their trade practises, which of course has had the desired effect of being like a red rag to a bull. This looks like a quite blatant attempt by Cameron to gain some positive media coverage back home after what has been a wretched few weeks for him and his government, by engaging in a little stick-poking and sabre-rattling.
Jingoism is the last bastion of the scoundrel.
By upping the ante with Argentina, he's re-enacting the policies of the junta, and while a conflict over a piece of rock thousands of miles away might stir the hearts of his party, it will do the country no good at all.
The man is a dangerous idiot.