…anger can be controlled. We cannot stop anger altogether, but if we simply become angry with those who blaspheme the Lord or the devotees of the Lord, we control our anger in Kṛṣṇa consciousness. Lord Caitanya Mahāprabhu became angry with the miscreant brothers Jagāi and Mādhāi, who blasphemed and struck Nityānanda Prabhu. In His Śikṣāṣṭaka Lord Caitanya wrote, tṛṇād api sunīcena taror api sahiṣṇunā: “One should be humbler than the grass and more tolerant than the tree.” One may then ask why the Lord exhibited His anger. The point is that one should be ready to tolerate all insults to one’s own self, but when Kṛṣṇa or His pure devotee is blasphemed, a genuine devotee becomes angry and acts like fire against the offenders.
The Nectar Of Instruction
By His Divine Grace A.; C. Bhaktivedanta Swami Prabhupada
Text One
The Hare Krishna Movement 