Jude 1:11 Woe to them! For they have gone in the way of Cain, have run greedily in the error of Balaam for profit, and perished in the rebellion of Korah.

Jude is writing about apostates.
An apostasy is an act of refusing to continue to follow, obey, or recognize a religious faith or the abandonment of a previous loyalty.
He says apostates are similar to Cain, Balaam, and Korah.
Cain brought the wrong sacrifice, became angry about his own mistake, and killed his brother.
Balaam was hired by the Moabites to curse Israel. God told him plainly he was not to curse Israel.
However the idea of making a profit was too much for Balaam and he ended up going with the Moabites, although he did not curse Israel.
Finally, Korah started a rebellion against the leadership of Moses and Aaron, whom God chose to lead Israel. Korah believed he was just as qualified to lead the people.
The problem with each of these men is they would not accept God’s decisions.
Indeed, this is the problem with many people that make up their own salvation, call sin a blessing, and blame the church when things don’t work out.