Refugees. Both escaped Jewish oppression before the war started. Had Hitler not begun murdering Jews, he might have had the atomic bomb before we did.
Oppenheimer was a first gen American.
He had to learn German (to study theoretical physics in Germany) on his own, his parents didn’t speak it in their home while he was growing up.
Robert Oppenheimer was born in New York City in 1904. His father was an immigrant from Germany in 1888.