Encouraging Stereotypes
The media has a long history of stereotyping some people. For example, a black man is a criminal, a Muslim is a terrorist, a woman is beneath the man, and so on.
The media is, to a large extent, responsible for how religious groups, minorities, or any kind of people are perceived by their viewers based on how that group is presented. If there is constant loathing spread about particular people, the masses will start to see how the media portrays them, thus causing a divide.