Historian Gabriela Sperl told AFP she made "NSU German History X", based on the real-life case of a far-right group that murdered nine immigrants and a policewoman, as a warning against xenophobic "indoctrination".
The killing spree by the National Socialist Underground, who targeted mostly Turkish and Kurdish shopkeepers, went undetected for more than six years with police at the time blaming the attacks on the Turkish mafia.
Sperl's three-part drama centres on Beate Zschäpe, a 41-year-old woman who has been on trial in Munich since 2013 for her part in the shootings and bombings.
Police claim Zschäpe is the only surviving member of the gang who carried out the murders. Her alleged accomplices Uwe Mundlos and Uwe Boehnhardt killed themselves after a botched bank robbery in 2011, which finally brought the group's activities to light.
Zschäpe, who is half-Romanian, denies she was ever a member of the NSU or that she took part in what became known as the "Kebab murders".
Sperl said the case is a lesson for Europe as a rising tide of right-wing populism sweeps a continent wrestling with its worst migration crisis since World War II.
Alienation and violence
When the group was caught, Sperl said, people downplayed their actions, saying they represented a tiny minority.
"Now four years later it is in the middle of society," she added.
Far-right movements are on the rise everywhere, she said. "Who would have thought five years ago that Marine Le Pen would win elections?" she said, referring to the leader of France's National Front.
"Suddenly, people feel so insecure."
Each 90-minute episode of the drama, which draws on the police investigation, parliamentary inquiries and interviews with members of the group, comes at the killings from a different angle.
The first is set in the old East Germany and is told from the perspective of Zschäpe, Mundlos and Boehnhardt, showing how disappointment with German reunification grew into alienation and violence.
"Everyone in the East was expecting that they would drive a Porsche or a BMW as the chancellor [Helmut Kohl] promised," Sperl told AFP as her films were shown at the Series Mania festival in Paris.
"He said that everybody would become rich. Actually what happened is that people from the West bought everything and Eastern people lost their jobs. The youngsters had no jobs and no hope."
Neo-Nazi groups from Austria and as far afield as the United States poured in to fill the vacuum, Sperl claimed.
Radicalised in prison
"They were indoctrinated like in every sect... It is the same as with the Muslim extremism, IS and its lost generation of youngsters. A boy breaks into houses, is finally caught and sent to jail, and they are radicalised there."
Scriptwriter Thomas Weindrich, who grew up in the East at the same time as the three alleged killers, said even after the fall of the Berlin Wall neo-Nazi movements were very marginal. "It was more like hooliganism, a skinhead movement."
Now he claims it is "impossible not to pass neo-Nazis in the street."
Sperl said that there has been wide international interest in the series, which has yet to be broadcast in Germany, with the producers in talks with networks in the US and Britain.
She said she first became interested in the killings long before the NSU were revealed to have been involved.
The former editor of the German magazine Der Spiegel, Stefan Aust, had told her of his suspicions that right-wing extremists had been killing immigrants, and she was already thinking of fictionalising the story.
With Zschäpe now facing a possible life sentence, Sperl warned that "neo-Nazis have rooted themselves in the heart of our society".
"If only there were only three of them," she said.
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