Being Arab does not make one Muslim. Most Arabs in many European countries are Muslims. In contrast, most Arabs throughout the America
s are Christian. Most Arabs in both the United States and Brazil are Lebanese. I believe the richest man currently in the world, is an immigrant or son of an immigrant to Mexico, and I believe he is half Arab/Lebanese.
Generally most Arabs in the United States distinguish themselves as so, at least many of the Palestinian (often Muslim) ones do who own corner stores in the central cities.
http://en.wikipedia.org/wiki/Arab_American