In John Dos Passos' 1919, part of the U.S.A. Trilogy, there is a strong theme of national identity and belonging. The quoted passage expresses a sentiment about patriotism and the idea of rejecting one's country. It suggests that if one does not appreciate the symbols of American identity, such as the stars on the flag, they should consider returning to their homeland. This reflects the tension between immigrant populations and native citizens during a time of significant social and political change.

The excerpt captures the frustrations of those who feel out of place in the evolving American landscape. It conveys a clear message about the expectation of loyalty and appreciation for one's country. At the same time, it hints at the complexities of immigration and cultural integration, showcasing the struggles and conflicts that arise when different backgrounds and ideals collide within a nation striving for unity.