There are American blacks, whose ancestors probably came to America long before your ancestors did, who are Muslims.
There are whites, such as Jihad Johnny from California, who are Muslims.
Both of these groups are AMERICANS, but most assuredly NOT ARAB in any way, shape, manner, or form!
There are Americans of Arab background, living in America or born here, who are CHRISTIANS!
Muslim and Arab are NOT synonyms!
Words have set definitions and when you deviate from them, it is YOU who lose the debate immediately; not to mention look foolish and stupid.
Oh and By the way, I know a woman who was born in Egypt, but who has been an American citizen for longer than you've been alive. She is a Muslim, but is a VERY patriotic American and I bet that she isn't the only one. She is NOT an Arab, but she IS a better CONSERVATIVE than YOU are; so put that in your pipe and smoke it. :-)