Isaiah 12:1. “And in that day thou shalt say, O Lord, I will praise Thee: though Thou wast angry with me, Thine anger is turned away, and Thou comfortedst me.”
This short chapter describes how we will worship Messiah, Jehovah, when He reigns over the whole earth from Jerusalem.
In that day: Always refers to end times Millenium. Jesus Christ, Messiah, is in complete control.
O Lord, I will praise Thee: ALL the people, not just the Jews who are restored to their land, will praise Messiah.
Thou was angry with me: The anger of God has been poured out, the Antichrist is defeated, and Israel is restored. While it is true that all people will honor Messiah, the Jews in particular will have more reason to rejoice as they acknowledge the righteous anger of God.
Thine anger is turned away: The time of retribution is past.
Thou comfortedst me: Israel is restored and reconciled to God. Peace is established.