What does Jeremiah 6:18 mean?

Were they ashamed when they had committed abomination? No, they were not at all ashamed, neither could they blush. Therefore they will fall among those who fall. When I visit them, they will be cast down,” says Yahweh.

Yahweh says, “Stand in the ways and see, and ask for the old paths, ‘Where is the good way?’ and walk in it, and you will find rest for your souls. But they said, ‘We will not walk in it.’

I set watchmen over you, saying, ‘Listen to the sound of the trumpet!’ But they said, ‘We will not listen!’

Hear, earth! Behold, I will bring evil on this people, even the fruit of their thoughts, because they have not listened to my words; and as for my law, they have rejected it.

To what purpose does frankincense from Sheba come to me, and the sweet cane from a far country? Your burnt offerings are not acceptable, and your sacrifices are not pleasing to me.”

Therefore Yahweh says, “Behold, I will lay stumbling blocks before this people. The fathers and the sons together will stumble against them. The neighbor and his friend will perish.”