Why does Martin Luther King call the March on Detroit a magnificent demonstration of discipline?

"March to Freedom" on Detroit was a demonstration of discipline.

Explanation:

"Martin Luther King" led the "March to Freedom" from Woodland to Cobo Hall. It was the march demanding equal rights and jobs just like white Americans. While they marched, they sang "We Shall Overcome" and then Martin gave the speech "I have a dream".

It was a peaceful protest and King urged the protesters against violence. He told them that people should not show hatred towards white Americans because they are also Americans just fighting for same rights. So, when they return back to their homes in North and South, they should believe that this situation would change.

The March was successful and there was no hatred speech or violence. Thus, it was a demonstration of discipline.