And You Thought The Hooligans Were Bad

From The Globalist:

In some of the major European leagues, the share of foreign players now reaches up to 60%. The 18 clubs of the German Bundesliga, for instance, currently employ 153 EU and 60 non-EU foreigners, adding up to a total share of 46%...

However, the globalization of the soccer economy has also aggravated xenophobic violence in stadiums all over Europe...

National soccer authorities are also continually fighting to eradicate the scourge of racism from the game. A year ago, soccer fans in Aachen, a town in Germany close to the border with Belgium and the Netherlands, almost experienced what could soon become a reality in stadiums. The referee threatened via loudspeakers to suspend the match between Alemannia Aachen and Borussia Mönchengladbach — after fans had called Brazilian player Kahe an “asylum seeker." The incident came only a week after racist slurs were made against Schalke striker Gerald Asamoah in Rostock...

In a more recent case, Dortmund goalie Roman Weidenfeller allegedly called Asamoah a “black pig” after a physically painful clash with the sturdy striker.

My hypothesis for explaining such deplorable behavior on the part of footballers?

Genetic inferiority.