Yes, Michael is Jesus Christ who is our Messiah the Prince (Daniel 9:24) who guarded HIS PEOPLE, Israel. Not only the Jews of Old Testament congregation but also the Gentiles (now spiritually Jews) in Christ in the New Testament congregation.
Matthew 24:21 For at that time there will be great tribulation, unmatched from the beginning of the world until now, and never to be seen again.
This is talking about the Great Tribulation period prior to Second Coming where ALL of Daniel's people (both old and new testament) will be delivers if their name is found in the Book of Life.
Since we are in New Testament period. The church is a representative of God's Kingdom on Earth, the kingdom representative that was taken from Old Testament congregation at the Cross. Therefore, the time of trouble is upon Christian (spiritual Jews) all over the world. Consider wisely:
Revelation 20:7-9 KJV
[7] And when the thousand years are expired,
Satan shall be loosed out of his prison,
[8] And
shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to
gather them together to battle: the number of whom is as the sand of the sea.
[9] And they went up on the breadth of the earth, and
compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
The New Testament Congregation of Israel is God's beloved city because they represented God's kingdom all over the Earth wherever the Christians are. The time of trouble is when Satan has marshaled the armies of false prophets and Christians coming into the church to deceive the messengers of the congregation who have NOT sealed by God. This is the judgment in which the "fire came down from God out of heaven" is symbolical of!
This has nothing to do with the physical city in the Middle East or a literal fire from heaven upon literal armies with guns and missiles! The battle of Armaggeddon is within the congregation of Israel where she has become a harlot - Babylon the Great.