A simple question, but not a simple answer. Not all Christians, famous or otherwise, acknowledge God as readily as some. Many have been lulled into silence because they do not want to offend. But the Bible tells us that the Gospel will offend, so we need to get over it and should unapologetically share the Gospel with a world that is literally going to Hell. It if hated Jesus Christ, it will hate us--the servant is not better that his master.
But I believe that most Jews do not really believe God. (It's a social/political association for most. The same could be said for many so-called Christians.) Jesus said that if they had in fact believed Moses and prophets, they would have believed Him.
For had ye believed Moses, ye would have believed me: for he wrote of Me. But if ye believe not his writings, how shall ye believe my words? (John 5:46)
It is written in the prophets, And they shall be all taught of God. Every man therefore that hath heard, and hath learned of the Father, cometh to me. (John 6:45)But there is hope:
(1) Brethren, my heart's desire and prayer to God for Israel is, that they might be saved. (2) For I bear them record that they have a zeal of God, but not according to knowledge. (3) For being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God. (4) For Christ is the end of the law for righteousness to everyone that believeth...(12) For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him. (13) For whosoever shall call upon the name of the Lord shall be saved. (Romans 10:1-4, 12-13)
Jesus is the exclusive path to God. (John 14:6)
http://www.chabad.org/therebbe/article_cdo/aid/62221/jewish/Universal-Morality.htm
...At the dawn of human history, G-d gave man seven rules to follow in order that His world be sustained. So it is recounted in the Book of Genesis as interpreted by our tradition in the Talmud. There will come a time, our sages told us, that the children of Noah will be prepared to return to this path. That will be the beginning of a new world, a world of wisdom and peace...
...THE 7 LAWS
1
Acknowledge that there is only one G-d who is Infinite and Supreme above all things. Do not replace that Supreme Being with finite idols, be it yourself, or other beings. This command includes such acts as prayer, study and meditation.
2
Respect the Creator. As frustrated and angry as you may be, do not vent it by cursing your Maker.
3
Respect human life. Every human being is an entire world. To save a life is to save that entire world. To destroy a life is to destroy an entire world. To help others live is a corollary of this principle.
4
Respect the institution of marriage. Marriage is a most Divine act. The marriage of a man and a woman is a reflection of the oneness of G-d and His creation. Disloyalty in marriage is an assault on that oneness.
5
Respect the rights and property of others. Be honest in all your business dealings. By relying on G-d rather than on our own conniving, we express our trust in Him as the Provider of Life.
6
Respect G-d’s creatures. At first, Man was forbidden to consume meat. After the Great Flood, he was permitted - but with a warning: Do not cause unnecessary suffering to any creature.
7
Maintain justice. Justice is G-d’s business, but we are given the charge to lay down necessary laws and enforce them whenever we can. When we right the wrongs of society, we are acting as partners in the act of sustaining the creation...