The country was defined as a secular nation with freedom of any religion. If you don't get that you didn't read or unable to read and are parroting other peoples logic.
You have just as much right to be christian, jew, atheist, agnostic, amish or anything you want to be. This is america, land of the free. And you are free. When people impose their will upon you or make laws that limit your ability to be free they are simply unamerican and it is the duty of the citizen to fight for and keep everyone in america free.
This country was not founded AS a christian nation and with good reason and to the credit of the character of our forefathers considering the religious environment.