From the American Family Association’s inimitably bigoted Bryan Fischer:
Nearly half of Muslims in the US say that they think of themselves first as Muslims rather than Americans. Now that's a problem. It's not a problem when a Christian says that. For the Christian to say "I am a Christian first and an American second," that's what we all ought to say. Our ultimate allegiance is not to country, not to the Constitution, it's to God and the the Scripture. If you have to make a choice between the two, we must obey God rather than man.
But when a Christan says "I'm a Christian first and an American second," the fact that he is a Christian first, he's got devotion and allegiance to Jesus Christ means he's going to be a better American. He's going to be an asset to his country, he's going to love his country, he's going to become more fervent in his patriotism. His love for his country and for its traditions are going to deepen because those traditions are rooted in the soil of the Judeo-Christian tradition.
Now if you have a Muslim, on the other hand, that says that - "I am a Muslim first and an American second" - look out! Because that indicates his ultimate devotion is to the Quran, it's to Allah, it's to Muhammad. It's not to Jesus Christ, it's not to the Judeo-Christian tradition, it is not to American values and American tradition and American history and American heroes - it is to Allah and Allah tells him to slay the idolaters wherever you find them.
So the more devout a Muslim gets, the more of a threat he becomes to America's nation security.
In short: Being a Christian-American makes you a better patriot, whilst being a Muslim-American makes you an evil would-be terrorist.
Glad that’s all cleared up.