When you don't like someone, you'll quickly accept false news about them, slander them, and spread gossip because you want them to suffer in some capacity. When you love someone, you'll make excuses for them and always look out for them. Allah's standard for justice is how you apply it to those you don't like.

"Let not your hatred of a people cause you to be unjust towards them. Be just for that is closer to piety. And be mindful of Allah for He is all aware of what you do." - Quran 5:8