I recently read a provocative post by someone named Dan Martin titled “Every Christian ought to be a muslim (but not in the way you think)!” I don’t want to engage the post fully, but if the title intrigues you (or burns your bottom) go check it out and see what he means.
In that post Dan makes the claim that “the God of Islam is NOT a different God than that of Christians and Jews” and says that God is “the God of Abraham, Jesus and Mohammed”. How can such a claim be sustained? This way: God has many names in the Old Testament, and one name used frequently is the name “El”. For example El Shaddai (God my provider), El Elyon (God Most High), El Yisrael (God of Israel), or simply Elohim which is the plural form of El. Well here’s the clincher, the Arabic word for El is Allah, and apparently Arabic-speaking Christians have been using Allah to refer to God the Father for centuries.
So we cannot say that just because Muslims use the Arabic form of God’s name (Allah) that they are not worshipping the same God as Jews, Abraham and Jesus. That would be like saying that because Christians are using the English form of Jesus’ name and not the Aramaic (Yeshua) or Greek (Ἰησοῦς) that we are not following the same Jesus as the early Christians.
Dan observes at this point that many Christians usually object by pointing out that “Muslims say Allah is not the Father of Jesus, so he must be a false god.” I’ll put it more pointedly: Muslims deny that Jesus was the Messiah of God, God incarnate. Therefore Muslims usage of the word “Allah” is incorrect. Thus, Muslims worship a false god and have a false religion. But here’s the point, by those standards Jews also worship a false god and have a false religion, and thus Jews are not the people of God and neither is the nation of Israel. This is because while orthodox or practicing Jews may worship “El” or “YHWH”, they deny that Jesus was the Messiah of God, God incarnate, their understanding of God is incorrect, and thus Jews worship a false god and have a false religion. If you apply this standard to say that Muslims have a false god and a false religion, you must apply this to Jews as well.
The exceptions here are “Messianic Jews”, but I think that term is superfluous unless it refers to a denomination of some sort. What is a “Messianic Jew”? It is a Jew who accepts Jesus the Messiah, i.e. a Christian. When Christian talk show hosts interview other Christians they don’t say, “I’m interviewing an Anglican” or “I’m interviewing an Orthodox” or “I’m interviewing a Roman Catholic” unless their particular theological orientation is of particular relevance to that particular interview. No, they are just interviewing “Christians”. But often when “Messianic Jews” are interviewed on Christian talk shows they are interviewed as “Messianic Jews” as if they where a separate and distinct people of God. All Christians, no matter their denomination, have one thing in common: they are all Christians. To separate converted Jews into a second and distinct class is to suggest that there are two separate and distinct people groups of God.
Jews and Israel who reject Jesus the Messiah of God, God incarnate, have a false religion and worship a false God just like Muslims. Jews who accept Jesus the Messiah of God, God incarnate, have become Christian.
 At this point I’ve diverged from Dan’s article where he assumes the legitimacy of Muslims claim to God by assuming his readers accept the Jewish claim to God. I don’t share that premise (even though I know most Evangelicals on a popular level do). I believe there are one people of God: The Israel of God made up of all, Jews and Gentiles, who believe in the Messiah of God; Jesus.