National Geographic has published in June 2009 a comprehensive article on Arab Christians. I am sure you will find it very informative, given the general ignorance of western Christians on this topic, even if you may not agree with the conclusions of the author (Don Belt).
I paste below the beginning of this article and I hope this will wet you appetite for reading the whole text. May some time for it. It is real worth it.
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Easter in Jerusalem is not for the faint of heart. The Old City, livid and chaotic in the calmest of times, seems to come completely unhinged in the days leading up to the holiday. By the tens of thousands, Christians from all over the world pour in like a conquering horde, surging down the Via Dolorosa’s narrow streets and ancient alleyways, seeking communion in the cold stones or some glimmer, perhaps, of the agonies Jesus endured in his final hours. Every face on Earth seems to float through the streets during Easter, every possible combination of eye and hair and skin color, every costume and style of dress, from blue-black African Christians in eye-popping dashikis to pale Finnish Christians dressed as Jesus with a bloody crown of thorns to American Christians in sneakers and “I [heart] Israel” caps, clearly stoked for the battle of Armageddon.
They come because this is where Christianity began. Here in Jerusalem and on lands nearby are the stony hills where Jesus walked and taught and died—and later, where his followers prayed and bled and battled over what his teaching would become. Huddled alongside Jewish converts in the caves of Palestine and Syria, Arabs were among the first to be persecuted for the new faith, and the first to be called Christians. It was here in the Levant—a geographical area including present-day Syria, Lebanon, Jordan, Israel, and the Palestinian territories—that hundreds of churches and monasteries were built after Constantine, emperor of Rome, legalized Christianity in 313 and declared his Levantine provinces holy land. Even after Arab Muslims conquered the region in 638, it remained predominantly Christian.
Ironically, it was during the Crusades (1095-1291) that Arab Christians, slaughtered along with Muslims by the crusaders and caught in the cross fire between Islam and the Christian West, began a long, steady retreat into the minority. Today native Christians in the Levant are the envoys of a forgotten world, bearing the fierce and hunted spirit of the early church. Their communities, composed of various Orthodox, Catholic, and Protestant sects, have dwindled in the past century from a quarter to about 8 percent of the population as the current generation leaves for economic reasons, to escape the region’s violence, or because they have relatives in the West who help them emigrate. Their departure, sadly, deprives the Levant of some of its best educated and most politically moderate citizens—the people these societies can least afford to lose. And so, for Jerusalem’s Arab Christians, there is a giddiness during Easter, as if, after a long and lonely ordeal, much needed reinforcements have arrived.