Satan (the Devil) is the Enemy.

Your brother is not your enemy.

Matthew 13:36-43

Isaiah 14:12-15; Ezekiel 28:11-19;Revelations 12:7-9; 1 Peter 5:8-9; John 10:7-11

Our Love for God is displayed through our love for our brothers and sisters.  I John 4:7-12

Build your brother up and help your brother.