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.
The cartoon on the cover of Charlie Hebdo, showed Erdogan sitting in a white T-shirt and underpants, holding a canned drink along with a woman wearing an Islamic hijab.
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.
Witnesses and relatives of the four Hyper Cacher victims — Yohan Cohen, Yoav Hattab, Michel Saada and Philippe Braham — spoke before the court.