Mahayana Buddhism teaches that of all the disturbing emotions, the worst of them all is hatred because the basis and starting point of Mahayana Buddhism is compassion. Hatred is the direct opposite of compassion. In Mahayana Buddhism, if you completely abandon your compassion for any being, you will have hatred in your heart. This breaks the Bodhisattva Vow from the root, and makes it impossible to arouse bodhicitta. Of all disturbing emotions, hatred is the worst. Hatred’s faults, and the sufferings it produces, are very numerous.
~ Depicted from Luminous Wisdom Book Series 10