We can’t get any more help from Solomon. His was a basic old testament faith; if you trust , worship and remain faithful to God, He will provide for you and protect you; if you neglect and turn your back on Him then you will face the anger of His wrath.
That explains why He believed God hated those who were unjust. 

So if the writer was not wrong, then maybe:
God lied , or went back on His Word

Straight away we know this to be incorrect, because it doesn’t sit right. It is the direct opposite of His nature:

‘Thus God, determining to show more abundantly to the heirs of promise the immutability of His counsel, confirmed it by an oath, that by two immutable things, in which it is impossible for God to lie, we might have strong consolation, who have fled for refuge to lay hold of the hope set before us.’ (Heb 6:17-19).

Two things we read about here:
 – The immutability of His counsel. What He says does not mutate, or change. In other words, what He says goes, until He says otherwise.
We do read about God changing His mind, deciding not to burn His wrath against His disobedient children, after Moses pleaded with Him (Ex32:7-14). But that’s the point – we read about it. Unless we read otherwise in His Word, we have to assume that God will carry out what He promised.
 – He cannot lie. If He did then He wouldn’t be God! If He does, then the hope set before us is cruel, and in vain.
So if God is always truthful, then yes, everyone who justifies the wicked, and everyone who condemns the just are an abomination.

Notice how God also sees no difference between the person who justifies the wicked and the person who condemns just people (‘both of them alike’). My parents used to say to my brother and I when we blamed each other for fighting; “Stop it! You’re both as bad as each other!”. He sees the corrupt ‘justifier’ and the corrupt ‘condemner’ being as both as bad as each other.

So if Solomon told the truth about God, and God does not lie or change, then it must be that:
We have misinterpreted the verse

We need to dig deeper to see what we missed.
Could there possibly be a way that God could be an abomination? And if so, when did that happen?
We have to look elsewhere in scripture to find the answer.

OK, let’s start by looking at the word abomination.

Strong’s Hebrew dictionary links it to the word tow`ebah
“A disgusting thing, abomination, abominable

1. 1. in ritual sense (of unclean food, idols, mixed marriages)

1. 1. in ethical sense (of wickedness etc)”.

An abomination in the eyes of God is something He can’t stand to look at. He will do anything to rid the abomination, or punish the transgressor for the abomination in order to be rid of it.
Some examples:

• • “If you will return, O Israel,” says the Lord, “Return to Me; And if you will put away your abominations out of My sight, Then you shall not be moved.” (Jer 4:1).

• • “Were they ashamed when they had committed abomination? No! They were not at all ashamed; Nor did they know how to blush. Therefore they shall fall among those who fall; At the time I punish them, They shall be cast down,” says the Lord.” (Jer 6:15).

• • “therefore thus says the Lord God: ‘Indeed I, even I, am against you and will execute judgments in your midst in the sight of the nations.  And I will do among you what I have never done, and the like of which I will never do again, because of all your abominations.   Therefore fathers shall eat their sons in your midst, and sons shall eat their fathers; and I will execute judgments among you, and all of you who remain I will scatter to all the winds.” (Ezek 5:8-10).

• • ““Therefore say to the house of Israel, ‘Thus says the Lord God: “Repent, turn away from your idols, and turn your faces away from all your abominations.” (Ezek 14:6).

These are just a few references, and there are many more I could have added (just read Leviticus alone, and you will find many).

But there are references that link abomination to sin, or being sinful:

• • “but you shall utterly destroy them: the Hittite and the Amorite and the Canaanite and the Perizzite and the Hivite and the Jebusite, just as the Lord your God has commanded you, lest they teach you to do according to all their abominations which they have done for their gods, and you sin against the Lord your God.” (Deut 20:17-19).

• • “Samaria did not commit half of your sins; but you have multiplied your abominations more than they, and have justified your sisters by all the abominations which you have done.” (Ezek 16:51).

• • “But when a righteous man turns away from his righteousness and commits iniquity, and does according to all the abominations that the wicked man does, shall he live? All the righteousness which he has done shall not be remembered; because of the unfaithfulness of which he is guilty and the sin which he has committed, because of them he shall die.” (Ezek 18:24).

Again, there are many more I could have referenced, but you get the point.

OK, so now we understand that it is sin that is the root cause of abomination, and God cannot look at the abomination. So could there be anywhere in the Bible where God somehow took on sin?

Yes,! As blasphemous as it might sound, there is:

• • “For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.” (2 Cor 5:21).

So am I telling you that the God, who –

• • created time (in the beginning God created)

• • created space (the heavens)

• • created matter (and the earth (Gen 1:1))

• • is perfect in every way (Deut 32:4); and

• • is without equal (Ps 86:8)

 – became like sin on behalf of us, so that somehow that might change how He sees us?

Yes! And this is the beautiful part!

God needed a sacrifice in order to put sin in it’s place. He had tried letting man make this sacrifice himself – but since he was born with a sin nature inherited from Adam – straight after making the sacrifice he would start sinning again!