Erich Maria Remarque was born in Osnabrück, Germany, in 1898 into a lower-middle-class family. In 1916, he was drafted into the German army to fight in World War I, in which he was badly wounded. Ten years after the war ended, he published Im Westen Nichts Neues, translated into English a year later as All Quiet on the Western Front, a novel about the experiences of ordinary German soldiers during the war.
When Remarque published All Quiet on the Western Front, he might not have known of the possible consequences it would have on his family, particularly his sister, who was killed by Nazi's in World War II partly because of her relationship with him. However, Remarque's novel had to be published, since it gives a first hand account of experiences of ordinary German soldiers during war.
What happened to his sister has no bearing on the publishing of the book. If he felt it was right, than it was the right thing to do. The book is a classic in literature and to not have published it would have been a grave disservice to the world.
Remarque was a German author that penned an incredible story about the terrors of war in his book All Quiet on the Western Front. His book was later turned into a famous movie which brought his story to millions more in theaters. Remarque paid a high price for his books once the Nazis took over Germany. His sister was punished for his books even. However, it was still important that his stories be told so that people around the World could read them.