What is the purpose of the sentence "These are the hard, brutal, and unbelievable facts" in the following paragraph?

The purpose of the sentence stated above is to provide a descriptive summary of the racial injustices that the Negroes experienced in Birmingham. It also creates an emotional impact to the readers which implements the use of adjectives to effectively narrate the scenarios.

Explanation:

the author is showing that it is the insatisfaction of basic needs that brings about the protests such as the strikes.if workers do not earn enough to buy food and feed their families and themselves in order to continue working, what is the use of working? besides, another message from the author is that of the owners of factories should be worried about ensuring their furure by having a second and third generation of workers in their industries.if they do not hear the workers demands, they will not have any more workers to make their pockets full.