The argument was between a waiter and a customer in a local bar and it concerned the merits or otherwise of the British football club, Chelsea. It was heated. Chelsea is one of the ten top teams in Britain's "Premiership league" and it is owned by the oligarch Russian expat Roman Abramovitch, who has spent perhaps a quarter of a billion on his team, mostly in signing up foreign-born players. So heated arguments about Chelsea come as no surprise.
Except that the bar was in East Africa.