Actually, most Arab-Americans are Christians, about 70%.
Unfortunately, Arab chr*stians have historically identified with their islamic co-nationals. Perhaps their minority status led them to believe that dedicating themselves to Arab nationalism would erase the difference between the moslems and themselves.
Chr*stian Lebanon was one of the invaders of Israel in 1948, and many Arab chr*stians (like Jews in chr*stian Europe) turned to radical universalism (Communism and French Grand Orient Freemasonry) to overcome their sense of alienation and not belonging. George Habash, founder of the Communist Popular Front for the Liberation of Palestine, was from a chr*stian Arab family.
And don't forget the "Palestinian" Latin Patriarch of Jerusalem, Michel Sabbah, who endorses the PLO and condemns Israel at every turn while telling his flock "we drove the crusaders out." Arab chr*stians drove the crusaders out? I'm sorry, but that is such a blatant attempt to blend into the majority culture!