Where is the idea of "campaign" in the Bible? Never heard of it.
The word "campaign" is not used in most Bible translations but the concept is everywhere. It most often is called God's will or his plan, and it overlaps with the term kingdom (the most misleading term in the English Bible, but we won't go into that here).
Jesus was killed for organizing a campaign, building a following that did not answer to any authorities but him. The authorities got more and more nervous as his campaign grew, fearing that when it got large enough, he would turn his peaceful following violent in a moment by announcing, "I am the new king and this is revolution day! We take power now!" They killed him so he would never have that chance.
The campaign goal is to bring God's peace to the whole world. The prophets all agreed that this would happen someday through one particular leader, specially appointed, sent, and installed by God. They called him the Messiah in Hebrew and the Christ in Greek, which means "anointed" (appointed and officially inaugurated to reign). We may call him the "campaign director," but we always have to remember that he is also the king, the regal, rightful ruler of the universe.
The whole Bible is actually the story of God's campaign. These are the sections of the story.
Why hasn't God finished the campaign yet?
In our minds the quick, logical way for God to achieve his campaign goals (connect, heal, bless) would be for him to send his angels or just say the word and zap everything. Problem solved.
Why would God spend 4000 years on a campaign he could have completed in a year or a milli-second? Because his timing is counter-intuitive, just like his entire campaign strategy.
His campaign strategy was not to use a SWAT team of angels to instantly kill all the agents of death and magically fill the world with God's life. His strategy was to use a team of human beings that would keep developing and working over the centuries and the millennia. In fact, the whole Bible is basically the story of this team and its part in God's campaign to connect, heal, and bless the world.
At the cross, the most counter-intuitive move in the whole story of his campaign, God brilliantly, patiently used human rejection of Jesus to serve the campaign's purposes. By raising Jesus from the grave, God transformed the cross into the greatest force in history for connecting, healing, and blessing people.
Nobody except Jesus himself saw that coming. Under God's inspiration, some of the prophets had actually revealed hundreds of years before that the Messiah would suffer and die, but it was so counter-intuitive that even after Jesus repeatedly told his inner circle of followers what was coming, they didn't get it. After Jesus suffered the ordeal, returned from death to life, and connected all the prophetic dots for them, they finally got their minds around it.
That's one reason that followers of Jesus are so fixated on the cross to this day. It tips us off that this whole campaign is not what we would have drawn up. God is full of surprises, and if we are on this campaign team, our motto needs to be, "Watch and learn."