holy men don't write books promoting war.
the whole "promised land" story was probably a propaganda campaign.
the entire pentateuch, the first 5 books of the bible, were written BEFORE the jews existed. I believe that it was in fact the phonecians' scripture, and idk if you know about the phonecians but they were basically pirates. liars, thieves and rapists of various colours and shapes.
anyhow, that's something of a controversial view, since it is foundational for both judaism and christianity. the book of enoch goes into quite some detail about several things that appear in these 5 books that are essential and core, and they disagree on several points, and one of them being this zionist chosen people horseshit.
i read a good article some time back that discusses the subject of the way that history turns into legend turns into myth, and it speculated exactly that, that the promised land story was precisely a propaganda campaign to rally the tribes to invade neighbours land.