Well to put this mystery into a context: I believe that faith and reason are not at war with each other: They are fundamentally allies in the search for Truth.
Both Judaism and Christianity have always been open to the findings of human intellectual effort, including the scientific. Perhaps there has been a bit of "lag time" involved, as in the case of the Galileo affair. But inevitably, Truth is truth, and the Church is in the Truth business. :^)
There is no one of authority within the Catholic Church that I know of, for instance, that denies the theory of evolution, or relativity theory, or quantum theory. Though the Church may have a quibble or two with the neo-Darwinist "take" on the former by reason of its severe reductionism.
We render unto Caesar's what is Caesar's; and unto God, what is God's. Now Caesar isn't necessarily in the Truth business. Indeed, most of the Caesars that I know of have gladly traded Truth for power.... That is the pressing problem.
I am not fond of politicians or judges as a class -- nor of "interest groups" who seek power (through coercion) rather than the truth of reality. FWIW
Having faith is imminently reasonable.. having no faith is not possible.. You need a measure of faith to go from point A to point B and expect to get back to A safe, or even to B..
Must be "some/many" have faith in "science", so much so they make excuses for it.. Just as some christians make excuses for things they do not understand with and about Christ, when no excuse is required.. Since the truth should be paramount in both spheres.. it often isn't..
Who is "pure".?.. no one I surmise.. One day all, might be very surprised, some happily, others disappointed.. Thats the way it should be I reckon.. Neglecting "faith" is a serious misjudgement I think.. For when faith is not required as critically anymore, it will be the most precious commodity in this Universe.. proven faith.. Faith in What must be the question.. for all have faith in something.. unless they off themselves for lack of any..