Answer: To tie it to another civil rights movement and bring attention to both plights.
Explanation: As was the fight for civil rights and the ending of discrimination against African Americans, women were deserving of the same rights. Ending the speech in this manner brings light to both fights for equal rights, and again, makes a strong point that justice and rights should be available to ALL since ALL are to abide by all laws.
As a way to use nonstandard English