The book of Nahum was given to a non-existent nation. God had already allowed the Assyrians to carry Israel into captivity before this prophet was commissioned to tell Israel that they will be saved. Obadiah prophesied to Edom and the prophecy ends with an end time prophecy of Jesus’ return. God has always warned of impending judgement on sinners. Noah warned the antediluvial world, Lot warned Sodom, Melchizedek warned the Canaanites, and the prophets warned the Israelites. After Elijah, the prophets also warned the surrounding Gentile nations.