False teachers reject and rebel against God's authority. Jude went on to describe 3 examples from the Old Testament to illustrate the severity of their sin.
Jude gives 3 Old Testament examples of God's victory over those resistant to His authority and those who turned from truth.
Jude exposed those who were denying God's truth. We must be aware of the same issue today and be willing to take a stand.
There are repeated warnings in both the New and Old Testaments concerning coming apostacy and the judgment of God which follows.
Introduction to Jude