After that Mark Zuckerberg is the chief of facebook why ?

Violence against Rohingya was provoked through Facebook: Mark Zuckerberg.The founder and CEO of the company, Mark Zuckerberg, admitted that Facebook used to provoke violence against minority Rohingya people in Myanmar's Rakhine state. In an interview given to Vox in the US online press, he said that there has been a lot of talk about Rohingya issue and there is no way to deny that Facebook has been 'real harm'.

He also said, "One Saturday I got a phone call, and then I saw the message through Facebook messenger is being said that the two parties are being in the same. In some messages the Muslims are alerting each other. The Buddhists have become angry. So keep arms with self-defense, go to such a place. People from other parties are also conducting the same conversation. We could catch the matter, I could stop it. Now we are giving special attention to such things.