Football hooliganism in Europe is not uncommon but unlike much of the rest of the continent, PSG's fanaticism is within its own stands and creating an example that is spreading into other clubs, such as Lyon, Nice and into Corsica.
France's government on Thursday announced a ban on five PSG fan associations after a supporter was killed following riots outside the club's stadium in February.
At the heart of the violence lies the rivalry between two sets of supporters - "Boulogne" known for far-right views and "Auteuil", which was set up to provide a multi-ethnic fanbase.
"When we think of PSG, we think racism," said Christophe Huldry, a spokesman for one the Auteuil associations, whose supporters were blamed for the murder. "When we go to a football match, it's not to die. We can't not do anything anymore."
The February riots saw about 150 Boulogne fans chanting slogans such as "Hitler for President". A group of Auteuil fans is teaming up with anti-racism groups to file 30 complaints against fellow supporters for racial slurs and violence.
"These penalties (are aimed) at eliminating from our stadiums pseudo supporters with totally unacceptable behaviour," Interior Minister Brice Hortefeux said of the government ban, which means five groups will be dissolved.
But the government has stopped short of evoking the racism issue, which has plagued PSG's stands for about 20 years.
"What's shocking is the Interior Ministry has recognised the problem of violence, but a lot less the subject of racism," said Carine Bloch, president of the sport's commission for the International League against Racism and Anti-Semitism (LICRA).
"At a time of crisis, we are seeing a push across Europe in nationalism and identity politics," Bloch said.
Still smarting from a beating in March's regional elections, Sarkozy has also revived a strident tone on law and order.
Boulogne spokesman Philippe Perreira has admitted that some fans in his stand are guilty of making Nazi salutes and chanting slogans, something that he condemns, but says is rife among "a young generation" and is being stamped out by older fans.
