What do the babies discovered by Noa in the train car represent in the book, The Orphan’s Tale: A Novel?

The train car of babies symbolizes the evil of Nazism. A train car full of Jewish babies is discovered by Noa at the train station. The fate of the babies is unknown. They may be used for anything from scientific experimentation to simply being murdered. This demonstrates the horrors and evils perpetrated by the Nazis.