The nazis and people who agreed with them wanted to protect the german community from "inferior" races. are there other examples in history or literature in which groups of people murdered innocent people in the name of "protecting" themselves? how are these examples similar to or different from the holocaust?

These examples are  similar to nazis when you compare the main objective, which was to protect the superiority of one race, the German.  

They are different when you think about how global and large scale was the Holocaust, and the murder of innocent people.

Even countries who weren't related to the conflict, somehow were affected for the results, receiving immigrants, nazi camps,and others.

Yes there are. An example is the killing of native Indians in the European colonization of the Americas.

Explanation:

The native Indians were seen as blood thirsty savages by the settling Europeans; on them, their families and their agricultural products. To protect themselves as they would see it, they murdered millions of native Indians.

the answer is b i think

if you want me to check your answer i agree with what you put. i read the story