Rederick Douglass and the abolition movement

Write a short paper answering the following questions:
Douglass had been invited to speak about the Fourth of July. Why does Douglass deny his connection to this holiday?
Who did Doughlass consider to be his constituency?
Douglass quotes at length from Psalm 137. Why?

2 or 3 sources. One source should be from the following source and the others from notable publications like the Washington Post not including encyclopedias, Wikipedia, or Wikipedia-like sources and 100% plagiarism free. If there are any questions or concerns please contact me.

Berkin, Carol. Making America: A History of the United States. Boston: Wadsworth, 2012.