I am a Christian (lapsed). But it's pretty common knowledge that the gospels were not written by Matthew, Mark, Luke, and John, but later in the first century by others. The whole history of the New Testament canon pretty much guarantees that church leaders' agendas were pushed, it's just human nature. Combined with the translation and revisions, it can't be used sole source for historical accuracy.

PVC wall of text in 3, 2, 1...