Answer:
Niemöller's poem reminds modern Jews that, as a people who were almost wiped out, it's our duty—as it is everyone's duty—to speak up for other minorities under attack, lest we be next. The shema sets us apart from other peoples; “First they came” binds us together again.
The story “Terrible Things,” by Eve Bunting, allegorizes the Holocaust, a genocide that occurred throughout Europe during the 1930s and 40s, to illustrate both the horrors of this time period and the failure of the masses to protect each other.
So they both had the message of protection and hope.