The four men were among 14 people on trial in connection with the terrorist assaults in January 2015, whose actual perpetrators were killed after jointly planning the attacks.
There is no human right, nor legal right in France, to not be offended. What is a human right, and a legal right, is freedom of speech and freedom of expression.
Approximately 18,000 Jews live in the city in close proximity. Several troops protect its Jewish quarter.
Prosecutors initiated a criminal investigation for alleged incitement to racist hatred against Eric Zemmour, a columnist and writer with ties to French far-right movements, on Thursday.
The attack took place in front of a building where Islamist militants gunned down employees of Charlie Hebdo in 2015 because of the republication of cartoons depicting Prophet Mohammad.
French officials said the attack was terrorism.
The city is doing so in celebration of the signing of the Abraham Accords in Washington, DC.
"The image that stays with me is of a trail of blood in the corridor leading to the newsroom."
The January 2015 attacks in Paris, where no less than 17 people lost their lives, were claimed by the Islamic state.
The fifth anniversary has taken on fresh relevance this year because the first trial of people accused of involvement in the attacks is to begin later this year.