It might be said that Anaya´s memoir is a celebration of the "elder". That is why, it is more appropriated to use the term "grandfather(s)" in plural, to make reference to all of them and not just his. It includes older generations and future generations. His father is just an example to illustrate what he is talking about.
This question is about "A Quilt of a Country"
Answer and Explanation:
Mario Cuomo's enigma was exposed to show how the USA imposes the concept of individualism on its growing population and encourages the adoption of this concept in all possible activities, however, in addition to being a defining concept of the American population, it is also a concept that is in constant conflict, thus creating a "social paradox", so to speak, because the nation that grew in an individualistic way, sees itself in various situations where it needs to work in the collectivity and in solidarity.
Within the text, Quindlen uses this concept of conflict between the collective and individualism as support for the argument that the USA is a multicultural nation, full of the most different ethnicities, but all this difference does not prevent the country made up of a single people that is subject to a single government.