I think the South Koreans and the USA do view DPRK nuke testing as an act of war.
Anyway that area isn't the focus for God. I see something happening to incapacitate Netanyahu as the next sign. Then Iran will try to 'wipe them out', but it will be them plus the entire ME region that will be depopulated by the Lord's Day of wrath.

As Bible prophecy does say a CME is what the Lord will use on His Day of wrath, Isaiah 30:26a, Psalms 50:1-2, Malachi 4:1, +, we should know what a CME is and what it can do.
Briefly: On the Appointed Day, Isaiah 10:17, the sun will explode out a huge, earth directed mass of superheated hydrogen plasma. The initial super bright flash and the Electro- Magnetic Pulse will arrive here within 8 minutes, causing armed nuke weapons to explode, Jeremiah 49:35, and all electrical systems are destroyed. The EMP will also cause tectonic plate movement, Deuteronomy 32:22, severe worldwide earthquakes.
The sun will be darkened by being obscured by the approaching mass and the moon will burn blood red from the plasma's thermite reaction with the moon dust.
24 hours after the explosion, the main mass will strike the earth, directly onto the Middle East, Zephaniah 2:4, wiping out the entire population, excepting a small remnant in Jerusalem. Isaiah 29:4, Jeremiah 10:18, Psalms 97:3-5, Zephaniah 1:14-18;+ [God's perfect solution to the ME crisis]
But as the earth is rotating and moving at 66,000mph on its orbital track, it quickly moves away and the rest of the world won't be so badly affected. The survivor's will form a One World Govt, but we Christians will gather and live in all of the holy Land. Ezekiel 34:11-31, Psalms 107, Isaiah 35:1-10
The great Day of the Lord's wrath; the Sixth Seal, will come upon everyone the whole world over. Luke 21:34-35 Proved by how Revelation 6:15 covers every person. Isaiah 24:1-2
No one will be taken away before this great test of our faith, 1 Peter 4:12, we will all see the cosmic effects and experience the devastation of that Day. Jeremiah 25:29-33
There are some signs to happen before that Day, we should know about. The 'sign of the fig tree budding', has occurred with the Jews establishing their own State in a part of the holy Land. Jesus said: the generation that see this will live to see it all. Matthew 24:32-34, Ezekiel 12:25
Another prophecy that requires fulfilment is Isaiah 3:1-7 and it may be that Micah 5:1 will precede it.
The world is, of course, as in the days of Noah, as they and now we; think is normal life. BUT they and now the modern world, have sidelined their Creator. People say 'there is no God' and the bulk of humans, just ignore the One true God and worship materialism, idols or false gods.
God will correct the situation; He did so before and He will do it again!
Isaiah 3:1-7 is specifically about Judah and Jerusalem. It says that they will lose their good leaders and the Lord will appoint incompetent youths to govern.
This prophecy must belong to the present day. Judah is a nation, they control Jerusalem and they have a strong and experienced leader in Benyamin Netanyahu. If anything happened to him, they would be in disarray.
Micah 5:1, is an interesting verse without any context to help explain it, says how Israel's ruler will be struck on the cheek with a rod. A 'rod' is a slang term for a rifle and today it is possible for a sniper to accurately hit people at ranges of up to 2 miles.
Isaiah 3:8-26, goes on to tell how rebel Judah will be brought low; the look on their faces testifies against them! Amazing prophecy, that perfectly fits the arrogant, LGBT and 'stiff necked' people who live in Israel now.
The Lord says: on that Day, I will take away your pride, instead of perfume there will be the stink of decay.....your men will fall by the Sword of the Lord and Zion will be stripped bare.
Wait for the Day!

Listen: It is the thunder of vast forces. Isaiah 17:12

Isaiah 18:3 All the inhabitants of the world will see the signs and hear the sounds of the Lord’s rebuke.  Isaiah 17:12-14
Jeremiah 4:23-29 At the sound of approaching disaster every town is in flight. People crawl into thickets and scramble up among the cliffs to hide. The earth is in chaos, the sky blackened, the hills are shaking and reeling and everybody disappears, even the birds and animals have gone. The whole Land is desolate, for the purpose of the Lord has been made known and He will not relent or change it.
Isaiah 29:5b-6 Suddenly, in an instant, punishment will come from the Lord with a thunder of great noise, earthquakes and storm tempests of devouring fire.
Jeremiah 25:30-31 The Lord roars from on high, He thunders from His dwelling place, He roars loudly against His Land, against all the inhabitants of the Land. The great noise reaches to the ends of the earth, as the Lord brings His judgement against all the nations and the godless peoples will die. Isa. 33:10-12
Isaiah 66:6 That roar from the city, the uproar in the holy Land, it is the sound of the Lord dealing retribution to His enemies.
Jeremiah 50:22 & 25 & 46 The sound of great destruction thunders in the Land. The Lord has opened His armoury and brought out the weapon of His wrath, it is His work to do against the Babylonish nations. The earth quakes and the noise is heard throughout the world. [Ancient Babylon was destroyed by Cyrus, he was the Lord’s instrument then, but this prophecy refers to those nations that have adopted beliefs and practices as a type of Babylon.]
Jeremiah 51:55 The advancing wave booms and roars like mighty waters, for the Lord is despoiling Babylon. [the ungodly nations] Isaiah 14:22-27
2 Peter 3:7 & 10 The Day of the Lord will come unexpectedly. On that Day, the sky will disappear with a great rushing sound and flames will envelope the earth, all in it will be brought to judgement.   Ref: REB. Some verses abridged and paraphrased.

‘The great noise reaches to the ends of the earth’, All peoples will hear it and be terrified. It will strike the Middle East at mid day. Zephaniah 2:4

‘the uproar from the holy Land is the sound of the Lord dealing retribution to His enemies’, destroying those who attack Israel and punishing His enemies worldwide. Psalms 94:1-7, Isaiah 66:15-17, Ezekiel 7:2-14, Micah 4:11-12, Hebrews 10:27

‘People crawl into thickets and caves to hide’, The parallel prophecy is the Sixth Seal; Revelation 6:15 and Isaiah 2:21

‘the sky will disappear with a great sound’, Also paralleled by the Sixth Seal; Revelation  6:14, Isaiah 34:4, 2 Peter 3:10

‘Sudden punishment from the Lord – thunder, earthquakes, storms of fire’, This can only be explained by a Coronal Mass Ejection, ‘the weapon of His wrath’, a sunstrike that suddenly hits the earth and it will literally cause all those graphically prophesied effects. Isaiah 30:25-28, Malachi 4:1 & 3

Deuteronomy 32:34-35 & 22  The Lord has a punishment in His storehouse, awaiting the Day of vengeance, the Day My enemies make a mistake will be their doom. For fire is set ablaze by My anger, it envelopes the earth and penetrates deep underground.
                                                                                                      Ref: logostelos.info