Jude 1:5 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.

“Jude 1:5 is the clearest direct statement, but it aligns with a consistent biblical theme: the same divine person (the Son, pre-incarnate Christ) who delivered Israel physically from Egypt is the one who saves believers spiritually through His work. Paul’s identification of Christ as the sustaining Rock in 1 Corinthians 10 is the strongest parallel. Early church interpreters and many modern ones read the Exodus through this Trinitarian/Christological lens.”

Quoted from Affinity

Another way of looking at this is that Jesus is the eternal God, is and always has been included in every decision and action. 

John 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.

John 14:9 Whoever has seen me has seen the Father.

John 17:5 And now, Father, glorify me in your own presence with the glory that I had with you before the world existed.

Exodus 33:11 Thus the Lord used to speak to Moses face to face, as a man speaks to his friend.

It is not unreasonable that Paul should write to Jude about Jesus being responsible for Israel’s delivery out of Egypt. As Paul tells Jude in verse 5, this is but a reminder of what Jude fully believed and understood.