Charlie Hebdo's editor-in-chief Gerard Biard has told France Inter, "A newspaper is not a weapon of war".
"I don't understand how people can attack a newspaper with heavy weapons," he added.
About 7,000 French Jewish people left the country last year and have moved to Israel because they did not feel safe.
The aunt of a man killed while trying to overpower gunman Amedy Coulibaly has told ITV News her family is fearful of their future in France.
A Muslim cleric in Pakistan has held a ceremony to honour Cherif and Said Kouachi, the two men suspected of the Charlie Hebdo massacre.