So why don’t evangelicals walk around saying they don’t worship the same God as the Jews, the same way they’re insisting on saying it about Muslims? Here’s the kicker: Evangelicals do believe they’re worshiping the God of the Old Testament — they just think Jews have failed to understand his essence as revealed in the New Testament.
In evangelical theology, God revealed himself to the Hebrews without expressly making his triune nature known. The incarnation changed all that, and created the possibility of Christian salvation. The Jews failed to get the message. All along, they were worshiping the triune God. They just never knew it, and still don’t.
Hence, to an evangelical Christian, it would make no sense to say that Jews worship a different God — even though to the Jews, that God isn’t theologically very different from the God of the Muslims. To bring this full circle, note that Pope Francis might well believe the same thing. The difference is that he believes Muslims, too, are worshiping the God of the Hebrews. Given that the Prophet Muhammad himself believed that the God of the Jews and of the Christians was the same God he was serving, that view seems pretty convincing. The pope’s view would have the benefit of being consistent as among Jews and Muslims.
If all this makes you want to run to atheism, fair enough. Otherwise, Merry Christmas!