therefore thus says Yahweh, “Behold, I am about to punish Shemaiah the Nehelamite and his seed; he will not have anyone living among this people, and he will not see the good that I am about to do to My people,” declares Yahweh, “because he has spoken rebellion against Yahweh.”’”
Jeremiah 29:30 Then came the word of Yahweh to Jeremiah, saying,
Jeremiah 29:31 “Send to all the exiles, saying, ‘Thus says Yahweh concerning Shemaiah the Nehelamite, “Because Shemaiah has prophesied to you, although I did not send him, and he has made you trust in a lie,”
Jeremiah 29:32 therefore thus says Yahweh, “Behold, I am about to punish Shemaiah the Nehelamite and his seed; he will not have anyone living among this people, and he will not see the good that I am about to do to My people,” declares Yahweh, “because he has spoken rebellion against Yahweh.”’”
The verse centers on "therefore", "thus", "says", "yahweh", "behold", "punish", "shemaiah", and "nehelamite". It is saying that the verse draws attention to "therefore" and "thus", so its meaning should be read from those terms before moving to application.
The prior verse says "Send to all the exiles saying Thus...", giving immediate footing for "therefore" and "thus". In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "therefore" and "thus" with trust shaped by these words, not by a vague optimism outside the passage.