Our sages teach us, God made the world of evil, to mirror the world of good, hence the logical, as well as empirical deduction, is as follows

Just as good people enjoy loving-kindness, similarly bad people enjoy acts of malicious-evil.

But more importantly, what’s the lesson?

I believe this is the truth.

Within us, as we are composite both of heaven and hell, God and the satan, is both pleasures.

So when we are loving, we take pleasure in kindness….