‘Therefore thus says the Lord Yahweh, “Because you have made your iniquity to be remembered, in that your transgressions are discovered, so that in all your doings your sins appear, because you are come to remembrance you will be taken with the hand.”
The brief statement at the end of Ezekiel 21:23 is amplified and it is made clear why the judgment of God is so severe. Their sins are speaking out clearly and loudly. By their sinful behaviour they have forced God's attention on what they are. Their transgressions are made openly apparent (there is no shame). In everything they do their sin appears. Thus they constantly come to His remembrance, and will be suitably dealt with.