Some do "cover," others "cover up" I guess.
I truly did not mean to contradict you, I am simply pointing out that there is a great movement of believers who are not stupid and ignorant of all ancient writings. The majority of mainstream Christian leaders have no desire to worship in any other way than in true Spirit and Truth. All American seminaries offer a full range of courses covering church history. We study the early church fathers, gnosticism, aryanism and have founded our faith on the truth we have accepted as truth. We study Hebrew and Greek. My daughter is studying ancient Greek and is doing her finals this weeks.
We read all Bibles translations and texts and do not discount anything as unworthy of study. We just process it differently from an agnostic, aryan, and athiest.
We do not hide from any truth, any books, anything ever written. We read it all and formulate our beliefs and faith accordingly, however, the simple truth of the actual gospel of Christ is simple enough for a child to understand. There is no evil in the teachings of Christ.