Answer:
The passage above shows a logical main idea organizational pattern as the author raises a series of questions about the point of having such a splintered and diverse nation. The author questions the purpose of having a nation in which different groups seem to be in conflict with each other, such as Jews and Arabs, blacks and whites, left and right, etc. The author then goes on to highlight the interwoven nature of these groups, which prevents them from dividing into new nations with new names. For example, the line "Other countries with such divisions have in fact divided into new nations with new names, but not this one, impossibly interwoven even in its hostilities" shows the logical progression of the author's main idea.
Based on the passage, it can be inferred that Quindlen views division in America as pervasive and deeply ingrained, but also complicated and paradoxical. She notes the paradox of Arab and Jewish cabbies driving each other around despite their theoretical hatred for one another, and the complex interweaving of different cultures and identities in America.
From the passage, it can be concluded that Quindlen views America as unique in its ability to hold together despite its many divisions and differences. Unlike other countries that have divided into new nations with new names, America remains a single nation, impossibly interwoven even in its hostilities. Quindlen seems to suggest that this is a testament to the resilience and adaptability of American culture and society.