A widespread scholarly understanding is that the Bible and its Old Testament works covers  approximately 4,000 years, beginning with the Creation and ending, presumably, around 164 BCE or with Malachi. Within those years it is claimed that God the creator killed 2.5 million people 227,037% higher than Satan under the auspicious "You shall not murder or You shall not kill", a moral imperative included as one of the Ten Commandments in the law. 

Jesus claims he is that same God who states, "Hear, O Israel: The LORD our God, the LORD is One". How does a God go from a mass murderer to the care of the same people. "And the second is like unto it, Thou shalt love thy neighbour as thyself". Is this a divine multiple personality disorder (also known by its clinical name, dissociative identity disorder).   A mental process which produces a lack of connection in a person's thoughts, memories, feelings, actions, or sense of identity. If so it means Jesus completely forgot who he once was to change his behaviour to love the same people he once killed. 

Conclusion: How did God the creator a once destructive God turn into a God of mercy and a God of Grace back to a destructive God in the Book of Revelation? Many say the Old Testament is the word of God so am I suppose to take it all as his word when the total killings are derived from his word.