The cruelest act of violence in the pre-flood world was not the murder of Abel. It was not Lamech's murder, and it was not the immorality of the sons of God. Rather, the cruelest act of violence in the pre-flood world was the war that man declared on God. To murder another person is a great offense, but to seek to knock God off His throne is an even greater atrocity.
Without Jesus Christ, all men would be at war with God. There would be no offer for peace and no hope for peace. True peace can only be found in the Lord Jesus Christ. Men on this earth may think they have obtained peace when they are safe and secure— pleased with their accomplishments. Men may think they are at peace for many (and often foolish) reasons, but all such peace is temporary if it is not found in Jesus Christ.
Not only is it cruel, but it is absurd to be at war with God. God cannot be knocked off His throne. He is unmovable, unshakable. He reigns eternally, having absolute and infinite power over all things. No matter how many wicked men seek to destroy Him, He endures in strength.
Though the men of the pre-flood world had declared war on God, there was no chance for victory. All their fighting and raging was in vain. God destroys those who speak falsehood (Psalm 5:6). He abhors the man of bloodshed and deceit (Psalm 5:6). Thus God spoke to Noah:
Then God said to Noah, "The end of all flesh has come before Me; for the earth is filled with violence because of them; and behold, I am about to destroy them with the earth. (Genesis 6:13)The men of the pre-flood world were at war with God. Though God strived with them, they refused to lay down their weapons; they continued in their violence and corruption. Thus judgment was coming. Those who refused to live for God's glory would die in the flood, and then, at the final judgment, be subject to eternal death.
Praise God for His justice! Praise God that He saves those who are undeserving of grace and undeserving of life! Great is His grace that is lavished on those who believe!
God's Ark Which Noah Built (Part 1) - Genesis 6:14
The Pre-Flood World Soon To Be Blotted Out - Genesis 6:7
How Bad Is Sin? (Part 1)
Why Is Sin Unavoidable? (Part 1)
Man in the Image of Man - Genesis 5:3