“Hear this, O house of Jacob, you who are called by the name of Israel
And who come from the [g]seed of Judah,
You who swear [allegiance] by the name of the Lord
And invoke the God of Israel,
But not in truth (sincerity) nor in righteousness [with moral and spiritual integrity]. Isaiah 48:1
But not in truth, nor in righteousness; not according to the will of God, nor truth of things; nor in the integrity of their hearts, but in an hypocritical way, and not in sincerity and uprightness; in word and tongue only, not in deed and in truth; worshippers of God they were externally, but not in spirit and truth. – John Gill
It is one thing for God to raise up a Cyrus who will let the Jews to return to Jerusalem. But will the Jews be willing to go? And if they are willing to return physically and rebuild Jerusalem, are they spiritually ready to abandon the sin that sent them into exile in the first place? It does not look good.