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