There is nothing fair or informed in you claim that non-western and poly-theistic cultures didn't (or didn't prior to Christianity) value human life and or believe the universe could be observed and measured. Since they weren't covered in you narrow field of study, I guess that's...not suprising.
I am curious if at any point during your Western Civ and Ancient Near East studies you ever came across the writings of a couple of enes (from the pre-Christian, polytheistic culture of Ancient Greece) by the name of Plato and Aristotle. I'd find it hard to believe that you didn't, since generations of Early Church monks and scribes took the time, care and attention to read, translate and re-copy the writings these philosophers...to the point that their writings ceased to be a mere exercise in Ancient Greek transcription and were incorporated into Christian theology.
So I guess if you can make an arrogant, dismissive claim that anything "good" about Islam is solely derivative of prior Christianity, then someone else can claim that anything scientific or philosophically high-minded about Christianity derived solely from prior enistic philosophy.
But I wouldn't be that obtuse, because that would be mere
historicism.