In the old testament times why did God instructed the Israelite to wipe out entire cities wherever they went?

In the Old Testament, God instructed the Israelites to wipe out entire cities, particularly those of the Canaanites, as a means of judgment against their idolatry and moral corruption. This was seen as a way to eliminate practices that were contrary to God's commandments, which could lead the Israelites away from their covenant relationship with Him. Additionally, it was intended to establish the Israelites as a distinct and holy nation in the Promised Land. The commands reflect the theology and historical context of ancient Israel, emphasizing divine justice and the preservation of their religious identity.