"Woe to them!" - They are cursed. May they be cursed.

"For they walked in the way of Cain" - Jealousy overtook them.

"and abandoned themselves for the sake of gain to Balaam's error" - He was at least considering the option of cursing the Israelites against the Lord's command for the sake of gaining riches.

"and perished in Korah's rebellion." - Korah, too, assumed his own holiness and refused to submit to the authorities that God had placed over him, Moses and Aaron.

Jude 1:11