Gen 6:5 And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.<quoted text>
According too the Book of Genesis, why does God murder all the people? There are no commandments. Please explain why this is just? Suppose you were pulled over and given a ticket for going through a stop sign which did not exist. Would you be OK with that?
6 And it repented the LORD that he had made man on the earth, and it grieved him at his heart.
7 And the LORD said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air; for it repenteth me that I have made them.
8 But Noah found grace in the eyes of the LORD
You should read Genesis 18. God speaks to Abraham on His way to Sodom and Gomorrah. It may give you a better insight of why God destroyed those cities. It also shows a little of God Himself. God is not unapproachable.
Archeologists have found the sight of Sodom and Gomorrah. The ruins show signs of impact and burning. They believe these cities were destroyed by a meterorite. The Bible calls it fire and brimstone.