The accusation that there is a disparity between the God of the Old and New Testament is based on three false assumptions. First, that the description of violence in history implies a prescription for Christians to do the same. Second, that the kind of violence described in the Old Testament was unjust for God to prescribe. And third, that there is a change in God's nature from the Old to the New Testament from Wrath to Love.
1. Historical descriptions of violence only prove honest history.
2. Every time God ordered violence to take place, it always was preceded by centuries of warnings and opportunities to be spared.
3. The concepts of God's love described in the New Testament are based on quotations from the Old.