Verse 3. - I am against thee, O Gog. Just because Gog was against Israel, Jehovah was against Gog. Gog's invasion of Israel's land would be a declaration of war against Israel's God. so that the conflict would rather be between Jehovah and Gog than between Israel and Gog. Hence throughout this prophecy Jehovah is represented as the principal actor on the side of Israel, who seeks her defense not in walls and bulwarks or in earthly alliances and military combinations, s in the days of the monarchy before the exile, but in the presence of Jehovah in her midst.
38:1-13 These events will be in the latter days. It is supposed these enemies will come together to invade the land of Judea, and God will defeat them. God not only sees who are now the enemies of his church, but he foresees who will be so, and lets them know by his word that he is against them; though they join together, the wicked shall not be unpunished.
And say, thus saith the Lord God, behold, I am against thee, O Gog, the chief prince of Meshech and Tubal. Which is repeated for the confirmation of it, that so it would certainly be; that the Lord, the mighty God, and King of kings, would in his providence frown upon him, and appear against him; and his titles are repeated also, to show that all his greatness, grandeur, and power, would not protect him from the vengeance of God.