Did Jeremiah's warnings apply to Israel as well as Judah?
Yes. Jeremiah foretold these things and tried to warn Israel as well as Judah, even though his ministry was predominantly in the southern kingdom. The warning given to one kingdom was for the other, because both had turned from God's statutes and covenant.
Les explains that Jeremiah foretold all these things and tried to warn Israel as well as Judah. Although Jeremiah was predominantly in the southern kingdom, what was for one was for the other. The surrounding context shows the Israelites rejected God's statutes and covenant, left His commandments, and even caused their sons and daughters to pass through the fire to Moloch. God could not take it anymore, and Jeremiah 44 reflects their mentality of turning their back on everything God had tried to do.