I'm afraid your misunderstanding of God's covenant with mankind under the Old Testament vs. the New Testament is preventing you from seeing the truth.
Also, do not forget that God's ways and means within, among and through people have always been, and will forever be confused for what they really are by people - because people are imperfect,
and only capable of seeing to the extent of their own mortality, and often their own motivations and biases.
God's work was documented in the Torah, The Old Testament, and The Koran - None of them speak to His power, grace and divinity as a being of love; that aspect of God is primarily known through the documented teachings through the life of Christ in The New Testament.
Does this mean that only Christians have a monopoly on understanding what it means to believe in the one true God, a being of great love?
No way.
In my opinion. God is also perfectly integrated within all science - contrary to the beliefs of so many. He doesn't need to differentiate between faith and laws of the universe as we know it.
That's my take.
-Halla74