In the beginning of Old Testment.
... the God tells Abraham that his descendants will spread throughout the world and he will be the father of great nations. He also convinces Abraham to leave his home land and go to Canaan. Consequently, Jews start living there and continue to spread. But doesn't this mean the conquest of others' lands? Why would the God choose exactly Abraham and assure him to take the land of others? It seems too political to be spiritual.
P.S. I just want to understand why it simply happened so.