1. to support france. the banners shirts and posters are to show that tey are against terrorism.
2. he was targeted bc the magazine publishers had pics that were mocking saddam Hussein. the terrorists names were Cherif and Said Kouachi who were involved with the Al Qaeda group
3. the other terrorist was named amedy coulibally who killed an unarmed policeman also he killed 4 people in a supermarket. Charlie hebdo was determined to show that the magezines could publish whatever they wanted. they did this by publishing a pic of saddam Hussein holding a "Je Suis Charlie" sign.