What are the 2 key main elements in Martin Luther King jrs speech, "i have a dream "?

Here's how he covered MANY important topic in his iconic I Have a Dream speech=

"But there is something that I must say to my people...in the process of gaining our rightful place, we must not be guilty of wrongful deeds. Let us not seek to satisfy our thirst for freedom by drinking from the cup of bitterness and hatred. We must forever conduct our struggle on the high plane of dignity and discipline. We must not allow our creative protest to degenerate into physical violence. Again and again, we must rise to the majestic heights of meeting physical force with soul force...I have a dream that one day on the red hills of Georgia, the sons of former slaves and the sons of former slave owners will be able to sit down together at the table of brotherhood...I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character."

alright, so here, the author clearly thinks that flooding the canyon was a bad idea and is showing bias against it.