Are there bad angels? Why are some angels bad?
Here's the answer:
Some angels, called demons, rebelled against God and followed the devil.
God created all the angels, including one named Lucifer, who was once a wise and beautiful angel. But Lucifer became proud of his beauty and tried to become like God (Isaiah 14:12–15). No one can be like God! God cast Lucifer, also called Satan, out of heaven, along with the bad angels who joined him. These bad angels are called demons.
Satan and his demons try to keep people from turning from their sin (things that displease God like lying, stealing, and disobeying) and coming to Jesus. They tempt people to sin.
We also see in the Bible that before humans were even created, God was planning to send Jesus, His Son, to save us from our sin (Ephesians 1:4–5; 2 Timothy 1:9; John 17:24). But besides this, anything else that went on before creation is a mystery. God has not chosen to tell us.
God is much stronger than Satan and the demons. In the end, God will punish Satan and the bad angels by sending them to hell forever. Those who haven’t trusted God’s one way to heaven—Jesus Christ—must also go to hell because of their sins. To learn more about how to trust Jesus, click here.
"Then he will say to those on his left, 'You are cursed! Go away from me into the fire that burns forever. It has been prepared for the devil and his angels'" (Matthew 25:41).
"Put on all of God’s armor. Then you can stand firm against the devil’s evil plans" (Ephesians 6:11).
"I am absolutely sure that not even death or life can separate us from God’s love. Not even angels or demons, the present or the future, or any powers can do that. Not even the highest places or the lowest, or anything else in all creation can do that. Nothing at all can ever separate us from God’s love because of what Christ Jesus our Lord has done" (Romans 8:38–39).