No theologian of any repute claims that the Bible was actually written by God. This is because the Bible itself attributes authorship to men, not God.
Generally, it is alleged that it was written by several, perhaps many authors, who were inspired by God.
Matthew, Mark, Luke and John were so named because they reputedly were written by those evangelists. Note that Luke and Mark are NOT Hebrew names, though all the Apostles were Jews. The same is true of the letters of Paul and Peter. God was allegedly inspired to write about some pretty petty matters in Paul's letters: specific parishioners in specific churches whose actions could not conceivably be of a fraction of the importance of the Crusades or the Holocaust. God apparently considered it of vital importance to the World that the Apostle Timothy personally circumcised himself, for example, and then Paul mentions that this was actually unnecessary later on.