Why does King bring up examples of violence in the US at the beginning of his speech?

King brings up examples of violence in the U.S. at the beginning of his speech to highlight the urgent need for social justice and to emphasize the deep-seated racism and inequality that persist in society. By referencing violent events, he illustrates the severe consequences of systemic oppression and the moral imperative for change. This framing not only captures the audience's attention but also sets the stage for his call to action, urging a nonviolent response to achieve civil rights and equality.