1)
What is Yirmeyah's point?
1.
Radak: What can Yisrael do? The false Nevi'im deceive them, and say 'you will not see sword and hunger'!
2.
Malbim: A punishment like this is proper for those who rebel b'Mezid to anger Hashem. Yisrael are deceived via the false Nevi'im, who say in the name of Hashem 'you will not see sword and hunger'! If not for them, they would heed the rebuke of the true Nevi'im!
2)
What is "Shalom Emes"?
1.
Radak: It is lasting Shalom.
