From time to time nice people blame Israel for the dwindling number of Christian Arabs in Israel and the PA. This is spite of the fact that the number of Christian Arabs all over the Mideast has been sinking dramatically for generations and is now close to zero in most countries. Apparently, Christian Arabs have an easier time getting out and into Europe, or North or South America, and they're taking advantage of it. Anyway, here's an article about the single large Christian Arab community that seemed, at least until recently, still mostly to be hanging on: the Copts in Egypt. Apparently, even though there are millions of them, it's getting harder and harder for them to remain amongst the majority Muslims.
By the way, it's interesting to note that the number of non-Arab Christians in Israel is actually rising, what with the influx from the ex-Soviet Union, and foreign laborers.