The speech "What to the Slave is the Fourth of July" by a former slave, Frederick Douglas, focused on showing the Independence Day and its principles such as freedom or liberty in the U.S. did not protect slaves, and therefore the ideals held by many only applied to part of the population. This tried to show the audience the importance of ending slavery and providing slaves the freedoms white people had.
In this context, this speech would be supported by abolitionist (people that wanted to end slavery) and they would be more receptive to it because they supported the idea of providing freedom and protections to slaves and ending enslavement, which is the focs of the speech.
Native American removal would reduce conflict between the federal and state governments. It would allow white settlers to occupy more of the South and the West, presumably protecting from foreign invasion.
I don't think that is is motif or resolution. I believe it is either the exposition, because expostition can give you background info. on the story, in the beginning of the novel or work of fiction.
