Ezekiel 11:21

I will recompense their way. — In striking contrast to the mercy granted to the repentant, is set forth here, as in Revelation 21:8, the Divine wrath upon the impenitent. It has never been promised that all men shall be brought to a true sense of their relations to God, for human responsibility, and consequently power of choice, is not removed; but God’s grace is never in vain, and if it does not lead to blessing through its acceptance, must result in greater condemnation through its rejection. (Comp. 2 Corinthians 2:16.)

The heart of their detestable things, is a figurative expression. Idols in themselves are inanimate things, but the heart of the people was so given to the spirit of idolatry and alienation from God, that the abstract, as usual with this prophet, is represented in this concrete, figurative form.