Biblically speaking, there are positive and negative aspects to hatred. It is  acceptable to hate those things that God hates; indeed, this is very much a  proof of a right standing with God. “Let those who love the Lord hate evil” (Psalm 97:10a). Indeed, the  closer our walk with the Lord and the more we fellowship with Him, the more  conscious we will be of sin, both within and without. Do we not grieve and burn  with anger when God’s name is maligned, when we see spiritual hypocrisy, when we  see blatant unbelief and godless behavior? The more we understand God’s  attributes and love His character, the more we will be like Him and the more we  will hate those things that are contrary to His Word and nature.

However, the hatred that is negative surely has to be that which is directed  against others. The Lord mentions hatred in the Sermon  on the Mount: “But I tell you that anyone who is angry with his brother will  be subject to judgment” (Matthew  5:22). The Lord commands that not only should we be reconciled with our  brother before we go before the Lord, but also that we do it quickly (Matthew 5:23-26). The  act of murder itself was certainly condemned, but hatred is a “heart” sin, and  any hateful thought or act is an act of murder in God’s eyes for which justice  will be demanded, possibly not in this life but at the judgment. So heinous is  the position of hate before God that a man who hates is said to be walking in  darkness, as opposed to the light (1 John 2:911). The  worst situation is that of a man who continues professing religion but remains  at enmity with his brother. The Scriptures declare that such a person is a liar  (1 John  4:20), and he may fool men, but not God. How many believers live for years  pretending that all is well, putting on a front, only to be found finally  wanting because they have harbored enmity (hatred) against a fellow  believer?

Hatred is a poison that destroys us from within, producing  bitterness that eats away at our hearts and minds. This is why the Scriptures  tell us not to let a “root of bitterness” spring up in our hearts (Hebrews 12:15). Hatred  also destroys the personal witness of a Christian because it removes him from  fellowship with the Lord and other believers. Let us be careful to do as the  Lord advised and keep short accounts with everyone about everything, no matter  how small, and the Lord will be faithful to forgive, as He has promised (1 John 1:9; 2:1).