Jude 1:5 Though you already know all this, I want to remind you that the Lord at one time delivered his people out of Egypt, but later destroyed those who did not believe.
Parts of the bible may be hard to read because of events where God destroys people when we think He is all loving.
Even the most loving parent has to bring discipline to a child who has gone astray.
God is trying to prepare us through examples; giving us plenty of warning and time to get ourselves right with Him before He once again removes the evil from the earth. We need to listen to Him now!