It would be unfair to make sweeping generalizations about the politeness and friendliness of an entire nation or its people. Politeness and friendliness can vary greatly from person to person and can be influenced by a variety of factors, such as cultural norms, regional differences, individual personalities, and the specific context of interactions.
Both New Zealanders and Americans, like people from any country, can exhibit politeness and friendliness in different ways. In general, New Zealand is known for its laid-back and friendly culture, often referred to as the "Kiwi hospitality." Many visitors to New Zealand appreciate the warm and welcoming nature of the locals. On the other hand, Americans are often considered to be outgoing, approachable, and willing to strike up conversations with strangers.
However, it's essential to remember that these are broad generalizations, and individual experiences can vary widely. People's behavior and attitudes can differ greatly within any country, and one's perception of politeness and friendliness can be influenced by cultural background, personal experiences, and individual interactions.
In conclusion, it's not accurate to make a blanket statement about the politeness and friendliness of New Zealanders or Americans as a whole. Instead, it's best to approach interactions with an open mind and judge people on an individual basis rather than relying on stereotypes or generalizations.