to obtain U.S. citizenship, you must take an Oath of Allegiance.
But the gospel, the Bible forbids it!
Matthew 5:34-37 (NIV)
34 But I tell you, do not swear an oath at all: either by heaven, for it is God’s throne;
35 or by the earth, for it is his footstool; or by Jerusalem, for it is the city of the Great King.
36 And do not swear by your head, for you cannot make even one hair white or black.
37 All you need to say is simply ‘Yes’ or ‘No’; anything beyond this comes from the evil one.
From this, we can conclude that Christians must not live in the United States, or US law should change and stop requiring Christians to take the oath of allegiance.