Because

Ezekiel 23:12
She too lusted after the Assyrians--governors and commanders, warriors dressed in splendor, horsemen riding on steeds, all desirable young men.

Isaiah 17:10
For you have forgotten the God of your salvation, and failed to remember the rock of your strength. Therefore, though you cultivate delightful plots and set out cuttings from exotic vines--

Jeremiah 2:32
Does a maiden forget her jewelry or a bride her wedding sash? Yet My people have forgotten Me for days without number.

Jeremiah 3:21
A voice is heard on the barren heights, the children of Israel weeping and begging for mercy, because they have perverted their ways and forgotten the LORD their God.

Jeremiah 13:25
This is your lot, the portion I have measured to you, " declares the LORD, "because you have forgotten Me and trusted in falsehood.

Jeremiah 23:27
They suppose the dreams that they tell one another will make My people forget My name, just as their fathers forgot My name through the worship of Baal.

Jeremiah 32:33
They have turned their backs to Me and not their faces. Though I taught them again and again, they would not listen or respond to discipline.

Hosea 8:14
Israel has forgotten his Maker and built palaces; Judah has multiplied its fortified cities. But I will send fire upon their cities, and it will consume their citadels.

Hosea 13:6
When they had pasture, they became satisfied; when they were satisfied, their hearts became proud. As a result, they forgot Me.

Romans 1:28
Furthermore, since they did not see fit to acknowledge God, He gave them up to a depraved mind, to do what ought not to be done.

and cast

1 Kings 14:9
You have done more evil than all who came before you. You have proceeded to make for yourself other gods and cast images to provoke Me, and you have flung Me behind your back.

Nehemiah 9:26
But they were disobedient and rebelled against You; they flung Your law behind their backs. They killed Your prophets who had admonished them to turn back to You. They committed terrible blasphemies.

therefore

Ezekiel 23:45-49
But righteous men will sentence them to the punishment of those who commit adultery and bloodshed, because they are adulteresses with blood on their hands. . . .

Ezekiel 7:4
I will not look on you with pity, nor will I spare you, but I will punish you for your ways and for the abominations among you. Then you will know that I am the LORD.'

Ezekiel 44:10
Surely the Levites who wandered away from Me when Israel went astray, and who wandered away from Me after their idols, will bear the consequences of their iniquity.

Leviticus 24:15
And you are to tell the Israelites, 'If anyone curses his God, he shall bear the consequences of his sin.

Numbers 14:34
In keeping with the forty of days you spied out the land, you shall bear your guilt forty years--a year for each day--and you will experience My alienation.

Numbers 18:22
No longer may the Israelites come near the Tent of Meeting, or they will incur guilt and die.