I keep getting myself into the same silly argument over and over with non-Orthodox people on another board I post on. I maintain, as it seems to me that it is right to maintain, that Islam does not worship the true God (the God of Christianity, which is the only God there is). I say Muhammad's "Allah" is a false God.
The non-Orthodox people who disagree with me always respond: "But what about the Jews? They reject the Holy Trinity, too, but surely they also worship the one God? Our Lord and Savior was a Jew, and we accept the OT prophets like David, Isaiah, Ezekiel and others, who were also Jews. Your view is inconsistent and wrong."
Honestly, I don't have a very good answer for this. I had an answer (maybe not a very good one, from an Orthodox perspective) when I was Roman Catholic that seemed to satisfy most of them, but now that I'm not bound by that anymore, I'm really trying to find out the Orthodox position on this. I just spent a half hour searching for "Pope Shenouda III + Jews" and "Coptic Orthodox + Jews" and many other combinations on Google...I got a lot of very strange and sometimes interesting results, but nothing helpful for answering this question.
I have watched various sermons on orthodoxsermons.org by Fr. Anthony Messeh, Fr. Paul Girguis, and others that say that Orthodox Christians don't worship the same God as the Jews, or the same God as the Muslims. I believe it (these other religions deny the Holy Trinity, after all), but I don't feel like I can explain it to other people when it is true that the Old Testament is accepted as the words of God, the OT prophets are accepted, etc. When I tried to make the argument last time that the Jews aren't worshiping the God who Christians are worshiping, one of these non-Orthodox people called me a "Marcionite heretic"! Ouch! :-\
Please, a little help, preferably from a Patristic viewpoint...!
Endless thanks for your time and assistance, Tasbeha.