There are dozens of threads, and hundreds of posts, in this forum on the problems with the NAB. Do a search.
But just to point out a few:
From the intro to Matthew:
“In large measure the material of these discourses came to Matthew from his tradition, but his work in modifying and adding to what he had received is abundantly evident.”
“The ancient tradition that the author was the disciple and apostle of Jesus named Matthew (see Matthew 10:3) is untenable…”
“The unknown author, whom we shall continue to call Matthew for the sake of convenience, drew not only upon the Gospel according to Mark but upon a large body of material (principally, sayings of Jesus) not found in Mark that corresponds, sometimes exactly, to material found also in the Gospel according to Luke. This material, called “Q” (probably from the first letter of the German word Quelle, meaning “source”), represents traditions, written and oral, used by both Matthew and Luke.”
“The post-A.D. 70 date is confirmed within the text by Matthew 22:7, which refers to the destruction of Jerusalem.”
Psalm 1:1
Happy those who do not follow the counsel of the wicked…
The only mention of Christ in the intro to the psalms:
“Many of the royal psalms were given a messianic interpretation by Christians.”
From the intro to Mark:
“In Mark, Jesus is portrayed as immensely popular with the people in Galilee during his ministry.”
“Petrine influence should not, however, be exaggerated. The evangelist has put together various oral and possibly written sources–miracle stories, parables, sayings, stories of controversies, and the passion–so as to speak of the crucified Messiah for Mark’s own day.”
From the intro to John:
“Other difficulties for any theory of eyewitness authorship of the gospel in its present form are presented by its highly developed theology…”
“Although tradition identified this person as John, the son of Zebedee, most modern scholars find that the evidence does not support this.”
How, you ask, are these “anti-Christian”? In the sense that they attempt to undermine belief in the truth of the gospels, and prophecies, and the witness of the early church fathers, they are indeed anti-Christian.