Reading about the Romani, as they prefer to be called, in Wikipedia, I found this:
"Romanies often adopt the dominant religion of their host country in case a ceremony associated with a formal religious institution is necessary, such as a baptism or funeral (their particular belief systems and indigenous religion and worship remain preserved regardless of such adoption processes)."
I think this is what Sarah's referring to. She continues with "...we had the immeasurable advantage of having provided Europe with it's religion without sharing it...Think what could have been done with that."
That last statement startles me. This is in the wake of the Holocaust, and Sarah is surely struggling with profound grief and shock. Naturally, she's thinking about how things could have been different and how Jewish people might avoid persecution in the future. At the same time, how much does she know about her husband's forgeries? Does she think he can help protect the Jews form future oppression? I wish we knew, but since Sherry knows, it makes sense that Sarah and Aaron would know as well. If they know about the forgeries, do they share his belief that "...the world shapes itself..." to what he writes?
Weer's impression that the house is like an aviary is puzzling. I'm tempted to say that Louis is using his family like canaries in a coalmine, but justifying that is a pretty long walk.
Instead, I'll say that I wish Wolfe had given us more about the relationships within the Gold family