The Catholic Church in his so called ecumenical drive is stating that both Jews and Catholics believes is this same Almighty God. Is that true? Let's take a deeper look.
If You dared to read full, amended, text of Nicene Creed You have notices kind of theological schizophrenia in it. It states that true God is from true God born not created but at same time is saying that the Son of God is the only one, has been born before the ages, as the incarnation of God made by Holy Spirit and the Virgin Mary.
Who is then the God according to Christianity and is this same God that Jews are praying? The answer is no. The Christianity is more a pantheistic religion with the concept of God begin invisible superpower while Judaism views the God more personal. Let's listen to Adon Olam - old Jewish Hymn:
Master of Universe
The Lord of the Universe who reigned
before anything was created.
When all was made by his will
He was acknowledged as King.
And when all shall end
He still all alone shall reign.
He was, He is,
and He shall be in glory.
And He is my God, my living God.
to Him I flee in time of grief,
and He is my miracle and my refuge,
who answers the day I shall call.
The Lord, according to the Jews, is no different from the Lord about which Jesus Christ was teaching. It is a Living God – not some unknown superpower in which most of the Christians are believing.
"God as conceived by Judaism is not only the First Cause, the Creative Power, and the World Reason, but also the living and loving Father of Men. He is not only cosmic but also personal....Jewish monotheism thinks of God in terms of definite character or personality, while pantheism is content with a view of God as impersonal." - Rabbi Samuel S. Cohon.
Still, it is a true, that many Israelites does not have so deep understanding of that topic and is rejecting psychical presence of the Lord. As most of Christians do. In that sense, they believe in same God. Or rather in his negation. And this is something on what Catholic Church can build further their idolatry.
The Lord thinks that their dream of God living somewhere in the sky and begin absent and invisible, soon will become reality. Enough is enough...