Just to say:
The Bible is approximately 77% Old Testament and 23% New Testament.
The Old Testament began with the books of Moses about 1,200 to 1,300 B.C. and reaches to Malachi about 445 B.C. for a total of about 750–850 years.
The Old Testament is Jewish Tanakh, aka teachings.
The New Testament (after birth of Jesus) covers about 60-65 years.
There were several other religions in that region which were always in fight with Jewish people.
Mohammedanism came much later in history, ~610 CE.
