Jeremiah 15 – Skeptic's Annotated Bible answered

1 Then said the LORD unto me, Though Moses and Samuel stood before me, yet my mind could not be toward this people: cast them out of my sight, and let them go forth.

God tells Jeremiah not to bother praying for the people. Even if Moses and Samuel (and Jesus?) were to ask him to reconsider, he wouldn't. He's going to kill everybody and nobody can stop him!

2 And it shall come to pass, if they say unto thee, Whither shall we go forth? then thou shalt tell them, Thus saith the LORD; Such as are for death, to death; and such as are for the sword, to the sword; and such as are for the famine, to the famine; and such as are for the captivity, to the captivity.

(15:2-4) "The sword to slay, and the dogs to tear, and the fowls of the heaven, and the beasts of the earth, to devour and destroy"
God plans to do three things to his people: 1) kill them with swords, 2) tear their flesh with dogs,  and 3) have the birds, and the beasts eat their bodies. Why will he do these terrible things? Because of something a former king did.

3 And I will appoint over them four kinds, saith the LORD: the sword to slay, and the dogs to tear, and the fowls of the heaven, and the beasts of the earth, to devour and destroy.

4 And I will cause them to be removed into all kingdoms of the earth, because of Manasseh the son of Hezekiah king of Judah, for that which he did in Jerusalem.

"I will cause them to be removed into all kingdoms of the earth, because of Manasseh ... for that which he did in Jerusalem."
Are we punished for the sins of others?

5 For who shall have pity upon thee, O Jerusalem? or who shall bemoan thee? or who shall go aside to ask how thou doest?

6 Thou hast forsaken me, saith the LORD, thou art gone backward: therefore will I stretch out my hand against thee, and destroy thee; I am weary with repenting.

God is weary of repenting. (It does get tiring after a while, doesn't it?)
Does God repent?
Does God ever get tired?

7 And I will fan them with a fan in the gates of the land; I will bereave them of children, I will destroy my people, since they return not from their ways.

(15:7-9) God again threatens Jerusalem with mass destruction. Here are some of the highlights: He will kill children, make more widows than there are grains of sand, terrorize cities, and then kill the survivors.

8 Their widows are increased to me above the sand of the seas: I have brought upon them against the mother of the young men a spoiler at noonday: I have caused him to fall upon it suddenly, and terrors upon the city.

9 She that hath borne seven languisheth: she hath given up the ghost; her sun is gone down while it was yet day: she hath been ashamed and confounded: and the residue of them will I deliver to the sword before their enemies, saith the LORD.

10 Woe is me, my mother, that thou hast borne me a man of strife and a man of contention to the whole earth! I have neither lent on usury, nor men have lent to me on usury; yet every one of them doth curse me.

11 The LORD said, Verily it shall be well with thy remnant; verily I will cause the enemy to entreat thee well in the time of evil and in the time of affliction.

12 Shall iron break the northern iron and the steel?

13 Thy substance and thy treasures will I give to the spoil without price, and that for all thy sins, even in all thy borders.

14 And I will make thee to pass with thine enemies into a land which thou knowest not: for a fire is kindled in mine anger, which shall burn upon you.

God will have you enslaved and, if you make him mad enough, he will burn you to death.

15 O LORD, thou knowest: remember me, and visit me, and revenge me of my persecutors; take me not away in thy longsuffering: know that for thy sake I have suffered rebuke.

16 Thy words were found, and I did eat them; and thy word was unto me the joy and rejoicing of mine heart: for I am called by thy name, O LORD God of hosts.

17 I sat not in the assembly of the mockers, nor rejoiced; I sat alone because of thy hand: for thou hast filled me with indignation.

18 Why is my pain perpetual, and my wound incurable, which refuseth to be healed? wilt thou be altogether unto me as a liar, and as waters that fail?

19 Therefore thus saith the LORD, If thou return, then will I bring thee again, and thou shalt stand before me: and if thou take forth the precious from the vile, thou shalt be as my mouth: let them return unto thee; but return not thou unto them.

20 And I will make thee unto this people a fenced brasen wall: and they shall fight against thee, but they shall not prevail against thee: for I am with thee to save thee and to deliver thee, saith the LORD.

21 And I will deliver thee out of the hand of the wicked, and I will redeem thee out of the hand of the terrible.