How effective is the poem in relating the Holocaust to readers?

Select any 2 poems about the Holocaust. You can select from the following list of poets/poems
Bronislawa Wajs: Tears of Blood
Primo Levi: Buna
Chaim Nachman Bialik: After My Death; On the Slaughter
Martin Niemöller: First They Came for the Jews
Mary Elizabeth Frye: Do not stand at my grave and weep
Carl Sandburg: Grass
Miklós Radnóti: Postcard 1; Postcard 2; Postcard 3; Postcard 4
Bertolt Brecht: The Burning of the Books; Parting; The Mask of Evil
Ber Horvitz: Der Himmel [The Heavens]
Yala Korwin: Passover Night 1942; The Little Boy with His Hands Up
Michael R. Burch: Something
Paul Celan: Death Fugue; O, Little Root of a Dream
Write an analysis of each poem, including the following information:
Explain the background on the author, especially in relation to the Holocaust.
Explain the content of the poem – what story or message is it trying to tell?
How does the poem relate to the bigger picture of the Holocaust?
How effective is the poem in relating the Holocaust to readers?