Here are some quotes from Metzger that show he was an unbeliever along with most other contemporary Bible scholars:
Genesis: "Nearly all modern scholars agree that, like the
other books of the Pentateuch, [Genesis] is a composite of
several sources, embodying traditions that go back in some
cases to Moses."
Exodus: "As with Genesis, several strands of literary
tradition, some very ancient, some as late as the sixth
century B.C., were combined in the makeup of the books"
(Introduction to Exodus).
Deuteronomy: "It's compilation is generally assigned to the
seventh century B.C., though it rests upon much older
tradition, some of it from Moses' time."
Daniel: "Most scholars hold that the book was compiled during
the persecutions (168-165 B.C.) of the Jewish people by
Antiochus Epiphanes."
John: "Whether the book was written directly by John, or
indirectly (his teachings may have been edited by another),
the church has accepted it as an authoritative supplement to
the story of Jesus' ministry given by the other evangelists."
1 Timothy, 2 Timothy, Titus: "Judging by differences in style
and vocabulary from Paul's other letters, many modern scholars
think that the Pastorals were not written by Paul."
James: "Tradition ascribes the letter to James, the Lord's
brother, writing about A.D. 45, but modern opinion is
uncertain, and differs widely on both origin and date."
2 Peter: "Because the author refers to the letter of Paul as
'scripture,' a term apparently not applied to them until long
after Paul's death, most modern scholars think that this
letter was drawn up in Peter's name sometime between A.D. 100
and 150."
INTRODUCTION TO THE OLD TESTAMENT:
"The Old Testament may be
described as the literary expression of the religious life of
ancient Israel. ...The Israelites were more history-conscious
than any other people in the ancient world. Probably as early
as the time of David and Solomon, out of a matrix of myth,
legend, and history, there had appeared the earliest written
form of the story of the saving acts of God from Creation to
the conquest of the Promised Land, an account which later in
modified form became a part of Scripture. But it was to be a
long time before the idea of Scripture arose and the old
Testament took its present form. ...The process by which the
Jews became 'the people of the Book' was gradual, and the
development is shrouded in the mists of history and tradition.
...The date of the final compilation of the Pentateuch or Law,
which was the first corpus or larger body of literature that
came to be regarded by the jews as authoritative Scripture, is
uncertain, although some have conservatively dated it at the
time of the Exile in the sixth. ...Before the adoption of the
Pentateuch as the Law of Moses, there had been compiled and
edited in the spirit and diction of the Deuteronomic 'school'
the group of books consisting of Deuteronomy, Joshua, Judges,
Samuel, and Kings, in much their present form. ...Thus the
Pentateuch took shape over a long period of time."
NOTES ON GENESIS: "[Genesis] 2.4b-3..24 ... is a different
tradition form that in 1.1-2,4a, as evidenced by the flowing
style and the different order of events, e.g. man is created
before vegetation, animals, and woman. ...7:16b: The Lord
shut him in, a note from the early tradition, which delight in
anthropomorphic touches. 7:18-20: The waters covered all the
high mountains, thus threatening a confluence of the upper and
lower waters (1.6). Archaeological evidence suggests that
traditions of a prehistoric flood covering the whole earth are
heightened versions of local inundations, e.g. in the Tigris-
Euphrates basin."
NOTES ON JOB: "The ancient folktale of a patient Job (1.1-2.
13; 42.7-17; Jas. 5.11) circulated orally among oriental sages
in the second millennium B.C. and was probably written down in
Hebrew at the time of David and Solomon or a century later
(about 1000-800 B.C.)."
NOTES ON PSALM 22: "22:12-13: ...the meaning of the third
line [they have pierced my hands and feet] is obscure."
[Editor: No, it is not obscure; it is a prophecy of Christ's
crucifixion!]
NOTES ON ISAIAH: "Only chs. 1-39 can be assigned to Isaiah's
time; it is generally accepted that chs. 40-66 come from the
time of Cyrus of Persia (539 B.C.) and later, as shown by the
differences in historical background, literary style, and
theological emphases. ...The contents of this section [chs.
56-66] (sometimes called Third Isaiah) suggest a date between
530 and 510 B.C., perhaps contemporary with Haggai and
Zechariah (520-518); chapters 60-62 may be later."
NOTES ON JONAH: "The book is didactic narrative which has
taken older material from the realm of popular legend and put
it to a new, more consequential use."
INTRODUCTION TO THE NEW TESTAMENT: "Jesus himself left no
literary remains; information regarding his word and works
comes from his immediate followers (the apostles) and their
disciples. At first this information was circulated orally.
As far as we know today, the first attempt to produce a
written Gospel was made by John Mark, who according to
tradition was a disciples of the Apostle Peter. This Gospel,
along with a collection of sayings of Jesus and several other
special sources, formed the basis of the Gospels attributed to
Matthew and Luke."
[Editor: The Gospels, like every part of
the new Testament, were written by direct inspiration of the
Holy Spirit. This nonsense of tying to find 'the original
source' for the Gospels is unbelieving heresy.]
NOTES ON 2 PETER: "The tradition that this letter is the work
of the apostle Peter was questioned in early times, and
internal indications are almost decisive against it. ...Most
scholars therefore regard the letter as the work of one who
was deeply indebted to Peter and who published it under his
master's name early int he second century."
[Editor: Those
who believe this nonsense must think the early Christians were
fools and the Holy Spirit on vacation.]
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