A far-right local councillor shocks Marine Le Pen's party by becoming a Muslim and sending Front National officials a video in which he urges them to embrace Islam
However, Mr Buttey remains a party member and a councillor. The party has no power to sack him from the post.
"Some of my voters will be disappointed by my choice," Mr Buttey admitted. "But I'm ready to explain to them that Islam has a mission to unite all men and women."
He said he found it difficult to believe the "official" version of the September 11 attacks, adding that there was doubt about the "Merah affair" -- referring to the al-Qaeda inspired French gunman, Mohammed Merah, who killed seven people in the south of France in 2012.
"I am against the niqab [full-face veil]," he said, adding that Islam did not call for believers "to cut off heads as the Islamic State group does."
Mr Buttey said he had decided to convert after lengthy discussions with the local imam, whom he met while campaigning for election earlier this year.
"I was Catholic but when I reread the Bible I noticed all its inconsistencies," he said. "When I read the Koran thoroughly, I understood that this religion is more open."
The leader of the Front National, Marine Le Pen, has objected to schools serving Halal meat for Muslim pupils, a controversial issue in France, which has banned the wearing of the full-face veil in public and headscarves in state schools. It has Europe's largest Muslim population, estimated at six million.