Those passages say, “The slain of the Lord will be many.” It is not war between men, but the Lord Himself which kills this multitude.
That is a good point, but it is difficult to understand in the light of Genesis 8:21 where YHWH promises to never again inflict a disaster on the world of flood-like proportions. My way of resolving this dilemma is to remember the mystical nature of our Creator’s name, YHWH, which may be rendered in other ways besides, “I am that I am.” I have read that YHWH may also mean, “I will be who I will be,” or even “I will be what I will be.”
I resolve the contradiction with the observation that men have harnessed the very power of God with nuclear bombs. It is this power that men will unleash against each other resulting in the catastrophe described in Isaiah 66:15-16 and Jeremiah 25:32-33. YHWH can be what ever He chooses to be, including a nuclear explosion.
Psalm 9:15-16 describes how YHWH has trapped the nations in the work of their own hands.
Isaiah 2:19 advises us to seek shelter deep underground, which just so happens to be the only defense against a nuclear attack.
Luke 12:49 warns of the fire that Jesus will bring to the world, and our Teacher later admonishes us that it will be sprung on the world suddenly, like a trap.
My conclusion is that the second coming of our Lord is the advent of global nuclear war.