The Bible is a record of the dealings of God with man. It is a record that shows the way to a relationship with God.
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Romans 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
And while the history is lists specific individuals and nations, since mankind is made of “common clay”, the lessons are universal. Jesus indicated this when he talked about the tragedy of a tower that fell and killed people.
Luke 13:1 There were present at that season some that told him of the Galilaeans, whose blood Pilate had mingled with their sacrifices.
2 And Jesus answering said unto them, Suppose ye that these Galilaeans were sinners above all the Galilaeans, because they suffered such things?
3 I tell you, Nay: but, except ye repent, ye shall all likewise perish.
4 Or those eighteen, upon whom the tower in Siloam fell, and slew them, think ye that they were sinners above all men that dwelt in Jerusalem?
5 I tell you, Nay: but, except ye repent, ye shall all likewise perish.
One of the things judged by God was the murder of children. Today it would be called abortion or infanticide.
Jeremiah 7:31 And they have built the high places of Tophet, which is in the valley of the son of Hinnom, to burn their sons and their daughters in the fire; which I commanded them not, neither came it into my heart.
Is there any difference between that and sending children into the fires of unnecessary war?
Jeremiah 7:23 But this thing commanded I them, saying, Obey my voice, and I will be your God, and ye shall be my people: and walk ye in all the ways that I have commanded you, that it may be well unto you.
24 But they hearkened not, nor inclined their ear, but walked in the counsels and in the imagination of their evil heart, and went backward, and not forward.
25 Since the day that your fathers came forth out of the land of Egypt unto this day I have even sent unto you all my servants the prophets, daily rising up early and sending them:
26 Yet they hearkened not unto me, nor inclined their ear, but hardened their neck: they did worse than their fathers.
27 Therefore thou shalt speak all these words unto them; but they will not hearken to thee: thou shalt also call unto them; but they will not answer thee.
28 But thou shalt say unto them, This is a nation that obeyeth not the voice of the Lord their God, nor receiveth correction: truth is perished, and is cut off from their mouth.
29 Cut off thine hair, O Jerusalem, and cast it away, and take up a lamentation on high places; for the Lord hath rejected and forsaken the generation of his wrath.
30 For the children of Judah have done evil in my sight, saith the Lord: they have set their abominations in the house which is called by my name, to pollute it.
31 And they have built the high places of Tophet, which is in the valley of the son of Hinnom, to burn their sons and their daughters in the fire; which I commanded them not, neither came it into my heart.
32 Therefore, behold, the days come, saith the Lord, that it shall no more be called Tophet, nor the valley of the son of Hinnom, but the valley of slaughter: for they shall bury in Tophet, till there be no place.
33 And the carcases of this people shall be meat for the fowls of the heaven, and for the beasts of the earth; and none shall fray them away.
34 Then will I cause to cease from the cities of Judah, and from the streets of Jerusalem, the voice of mirth, and the voice of gladness, the voice of the bridegroom, and the voice of the bride: for the land shall be desolate.