4 For certain persons have crept in unnoticed, those who were long beforehand marked out for this condemnation, ungodly persons who turn the grace of our God into licentiousness and deny our only Master and Lord, Jesus Christ.
5 Now I desire to remind you, though you know all things once for all, that the Lord, after saving a people out of the land of Egypt, subsequently destroyed those who did not believe. Jude 1:4-13 (NASB) (Read verses 6-13 on the site)
God is Sovereign. There is not one area of creation in which He is not Sovereign. Evil exists and men do evil things, but in that God is still Sovereign. Creation is cursed and God has not yet culminated this age when He will restore it to its proper relationship with Him. However, He has sent His Son to be the propitiation for the sins of the Elect. At the cross, He redeemed them. However, in life here on planet Earth they must still live in this fallen world. Jesus warned His Apostles and us about what this life would be like for His people on this cursed planet from the birth of the Church until the culmination of the end of this age.