Perfected beings don't get angry in general, for anger rises only where there is incapability to cope with the way things exist. read more
Krishna became angry with the serpent Kaliya for poisoning the waters of the Yamuna and causing the death of His dear cows and friends; He became angry in His form of Lord Narsimhadeva and killed Hiranyakashipu who was torturing his own son, Prahlada, whose only fault was that he was a pure devotee of God. read more
Lord Sri Krishna was well aware of Bhishma and he knew that he was a great devotee of him, so by running in the war toward Bhishma and holding Chariot wheel as Chakra, he fulfilled the desire of his Bhakta Bhishma. Second time, Lord Sri Krishna became enraged at Aswasthatma the son of Guru Dronacharya. read more
Lord Krishna was angry with Duhshasana most of all, for he was the most evil of all the Kauravas. He also felt anger over Duryodhana's stupidity, but most of the time, He was just confident and detached. read more