What does it mean to be American?

Why does being born here make people more American
than those who have or wish to immigrate here? 

On the left, I transformed the Constitution into a word cloud to represent the rights of all citizens. In the middle, I used the American flag to unite the two documents as American. On the right, I transformed the process to become a naturalized citizen into a word cloud to represent the steps people have to go through to become American citizens.