We are commanded by Jesus and the apostles to love one another. Hating one another is a sin. But the apostle John says it like this:
1 John 2:9-11 NIV
Anyone who claims to be in the light but hates a brother or sister is still in the darkness. Anyone who loves their brother and sister lives in the light, and there is nothing in them to make them stumble. But anyone who hates a brother or sister is in the darkness and walks around in the darkness. They do not know where they are going, because the darkness has blinded them.”
So think about your relationships with fellow Christians. Do you love them or hate them?
OK, now you might say that you love the significant majority, and only hate a few. But John doesn’t say to only hate a few of them. We are called to love one another even if we don’t like each other sometimes or rub one another the wrong way.
So if you harbor hate for a fellow believer, come out of the darkness and into the light.