Jude 5 says:
Now I want to remind you, although you once fully knew it, that Jesus, who saved a people out of the land of Egypt, afterward destroyed those who did not believe.
Interestingly, Jesus destroyed the rescued Israelites because they did not believe the spies’ report regarding the land of Canaan (Num. 14:29-30). Numbers 14:36-37 says:
And the men whom Moses sent to spy out the land, who returned and made all the congregation grumble against him by bringing up a bad report about the land—the men who brought up a bad report of the land—died by plague before the Lord.
Referring to the same incident Paul comments, “We must not put Christ to the test, as some of them did and were destroyed by serpents, nor grumble, as some of them did and were destroyed by the Destroyer.” (1 Cor. 10:10)
To the extent Jude 5 and 1 Corinthians 10:10 reference the same incident, we see Jesus was the Destroyer.
Even more, concerning the Passover the “LORD will pass over the door and will not allow the destroyer to enter your houses to strike you” (Ex. 12:23). Thus, “Destroyer of the firstborn” (Heb. 11:28) was also Jesus.
Jesus: pre-incarnate Logos, God’s Beloved Son, Destroyer of the Firstborn.
Some might view this as odd—if not deplorable. However, if correct, I see it as Good News: the Destroyer came into this world and was mercifully destroyed on my behalf. The killer of the firstborns of Egypt was Himself God’s Firstborn, struck down and crushed in my stead.
Returning to Jude 5, it becomes very interesting how Jesus “saved a people out of the land of Egypt.” Not only does the unblemished lamb of the Passover ultimately foreshadow Jesus, “our Passover Lamb” (1 Cor. 5:7), but Jesus was also the agent of liberation who “struck down all the firstborn in the land of Egypt” (Ex. 12:29).
And all this points to the Final Exodus (Lk. 9:31), the Cross of Christ, where Jesus “firstborn of creation” (Col. 1:15) became the Lamb of God (Jn. 1:36), slaughtered and destroyed for our iniquities; and now is “the firstborn from the dead, that in everything he might be preeminent.” (Col. 1:17)
“Worthy is the Lamb who was slain,
to receive power and wealth and wisdom and might
and honor and glory and blessing!”
“To him who sits on the throne and to the Lamb
be blessing and honor and glory and might forever and ever!” (Rev. 4:12-13)