Paul said to Ananias, “God will hit you, too! You are like a wall that has been painted white. You sit there and judge me, using the law of Moses, but you are telling them to hit me, and that is against the law.”
That punishment is especially for those who live by doing the evil things their sinful selves want and who hate authority. These false teachers are bold and do anything they want. They are not afraid to speak against the angels.
It is the same with these people who have entered your group. They are guided by dreams and make themselves filthy with sin. They reject God’s authority and speak against the angels.