Adam Clarke on Jeremiah 42:20

For ye dissembled in your hearts - What a most miserable and incorrigible people! Ingratitude, hypocrisy, rebellion, and cruelty seem to have been enthroned in their hearts! And what are they still? Just what their fathers were, except in the mere article of idolatry; and that they do not practice because they are indifferent to their own religion and to that of all others. Examine their devotions and their lives, and see whether Charity herself can say they believe in the God of Abraham!