Why do Americans love to hang the national flag at home?

I think they like to hang the national flag for several reasons.

1 is decorative, so everyone likes to hang it.

2. Because the United States is more developed and proud of being an American, hanging the national flag means that you are an American. If you are from China, you probably don't have such a sense of belonging.

It has become a symbol. For example, American movies have a great influence. A symbol of culture.