Facebook founder Mark Zuckerberg announced on Friday in Berlin that he recognized that Facebook needs to crack down more on "hate speech" against migrants. In September, Facebook announced that it would work with the German Justice Ministry to crack down on anti-migrant posts . Under German law, social media users who incite hatred or violence against an ethnic or religious group can be punished by up to three years in jail. "If people, using their own name, incite hatred against other people, not only the government has to act, but also Facebook should do something against those statements," German Chancellor Angela Merkel told the Rheinische Post. Facebook has been in discussions about privacy and hate speech with Germany for months. Last summer, it announced that it would conform to Germany's strict hate speech laws and attempt to take down racist posts within a day.