A question was asked and deserves a complete answer. “Doesn’t God use violence?” The short answer is yes, in His righteous judgement he sometimes uses violence. However He does send warnings to the people first, Jonah was sent to Nineveh and we read in Joshua 2:10, “For we have heard how the LORD dried up the waters of the Red Sea before you when you came out of Egypt, and what you did to Sihon and Og, the two kings of the Amorites across the Jordan, whom you devoted to destruction.” Only Rahab and her family were untouched by the destruction not only because of her kindness, she had changed her heart. Some of the warnings that were sent to other nations we are told about and others we are not.