1) Korah, Dathan, Abiram, and 250 community leaders became insolent and opposed Moses and Aaron, complaining that they had gone too far in their leadership roles. 2) God caused the earth to open up and swallow Korah and his followers as punishment for their complaints against Moses and Aaron. Fire also came from the Lord and consumed the 250 men who offered incense. 3) The document discusses the difference between the "humble" who are grateful for what God has given them and the "rabble" who are always demanding more and complaining, even after God delivers them from hardship. It warns about the costs of complaining rather than creating.