The entire book of 1 John is engaged in this idea about good and evil, light and darkness, truth and error, and John is intent on showing his readers that based on who God is and what Jesus has done for all people, we can choose to live in love, light, and righteousness, rather than
abide in hatred, darkness, and evil.
He hates God, he hates Jesus Christ His Son with all the
hatred he has, and he will do anything
in his power to separate those human beings which God created for Himself to fellowship with, who by loving Him and allowing Him to become their Lord, become His living temples, where He
abides in their hearts, from God who created them.