Cairo - Thousands of extra French police are set to be on duty later Friday in Paris and other major cities following clashes involving Algerian football fans that have touched off a debate about national identity.
Algeria play Senegal in the final of the African Cup of Nations on Friday evening with excitement high in France which is home to a huge Algerian-origin population due to the country's colonial history.
Thousands of people partied in the streets when Algeria won its quarter-final on July 11 and then again for the semi-final on July 14, but the celebrations were later marred by pillaging and street clashes.
"I call on people celebrating, even if I understand their joy, to behave themselves," Paris police chief Didier Lallement told a press conference on Wednesday.
Around 2 500 police officers will be mobilised around the Champs-Elysees and Arc de Triomphe where crowds set off fireworks and flew flags from car windows last Sunday, which was also France's national Bastille Day.
Clashes with police in the early hours, following pillaging the week before, saw more than 200 people arrested, leading to condemnation from the police and government, as well as far-right politicians.
The fact that the semi-final coincided with Bastille Day, which celebrates the French republic and its armed forces, irked nationalist politicians in particular who worry about the effects of immigration.
"Like lots of French people, I was shocked to see French people take down the French flag and put up the Algerian one," far-right politician Nicolas Dupont-Aignan said on Friday morning.
Dupont-Aignan said the French-born Algeria fans, many of whom have dual nationality, could "go back" to north Africa if their preference was for Algeria.
"I want to ask these young people, who are a minority I hope: France has welcomed you, fed you, educated you, looked after you, but if you prefer Algeria, if it's better than France, go back to Algeria!"
Violence has flared in France in the past after major football games involving Algeria including during World Cup games in 2014, which led far-right leader Marine Le Pen to propose stripping rioters of their French nationality.
"Their victories are our nightmare," a spokesperson for Le Pen's National Rally party, Sebastien Chenu, said Monday. "Whenever there's a match with Algeria... there are problems."
A France-Algeria friendly in 2001 in Paris saw the French national anthem copiously booed in what was the first meeting on the pitch between the countries since Algeria's independence in 1962 following 130 years of French rule.
The National Rally has called for Algeria fans to be barred from the Champs-Elysees on Friday, a demand dismissed as impractical and unfair by the Paris police force.
"For me, the people coming to the Champs-Elysees are joyous citizens," police chief Lallement told the press conference.
Volunteers help police
Others have pointed out that the overwhelming majority of fans marked Algeria's last two victories in the Africa Cup peacefully and that many Franco-Algerians feel free to celebrate the successes of both countries.
"We are saddened by the events of July 14," Faiza Menai from Debout l'Algerie, a collective that unites members of the Algerian diaspora in France, told AFP on Thursday.
She recalled that France had seen six months of violent demonstrations during the so-called "yellow vest" protests against the government, which were supported by Le Pen and other far-right groups.
The football violence was caused by not only by Algerians, she said, and was the result of an angry minority living frustrated lives in low-income and neglected suburban areas that ring French cities.
"It's a pity that there are people who show up just to cause trouble. As in the case of the yellow vests, you have these young guys who missed the point -- they come in from the suburbs and take advantage of the situation to get their revenge," she said.
Her group plans to send out volunteers in florescent orange vests to the Champs Elysees to "try to limit the damage by raising awareness among supporters and lending a hand to authorities."
Azouz Begag, a novelist and former minister in France's government in 2005-2007, called on fellow Franco-Algerians to "state again after the match against Senegal that they are in their home in France, that they pay taxes and are voters.
"The public spaces of the republic are theirs," he wrote in Le Monde.