How did the leaders of the civil rights movement address their audience

Through speeches, the leaders usually tried to appeal to all audiences. Martin Luther King Jr’s speech “I have a Dream” was given to both dark-skinned and light-skinned people.
At first, he aims the speech at the light-skinned people, by referring to the dark-skinned person as someone separate.
The second part of the speech was more directed toward the dark-skinned people, so he used terms like “my people” and “we”
The third part of the speech was when he called for unity and referred to everyone as friends, and talks about his dream.