One way in which Americans developed a unique cultural identity after the Revolution was by ratifying the Constitution, which created a true "nation" as opposed to a lose confederation of states, which allowed people to develop a sense of nationalism and "pride" in their country.
In a general sense, it was because of the oppression that Britain had put over the colonies that led to the Declaration of Independence. Some of the many factors included tax impositions, the Boston Massacre, Coercive Acts, and Common Sense by Thomas Paine.
Moreover, the declaration was written by a committee of five including Thomas Jefferson (primary author), John Adams, Benjamin Franklin, Roger Sherman, and Robert Livingston and ratified on July 4, 1776 in Philadelphia.
Many poor Europeans were drawn to the colonies in the americas because they believed they could raise their social status in the colonies
Jesus: Miracles
Muhammad: He established with his followers that he was sent by God
Moses: He wandered 40 years with the Israelites and brought them to the promised land