Despite what I said earlier about anger being acceptable, it was not in my faith upbringing. It was considered a vile sin. So instead of allowing it to be expressed in a non-violent manner, it gets suppressed. Which means that it builds up and up until it reaches a critical mass and explodes in a most destructive way.
Alternatively, some turn it on themselves which then it becomes depression or self hatred.
And you went to the place I was going with my question.
My (our?) lord and savior became angry: (KJV)
''1And he entered again into the synagogue; and there was a man there which had a withered hand.
2 And they watched him, whether he would heal him on the sabbath day; that they might accuse him.
3 And he saith unto the man which had the withered hand, Stand forth.
4 And he saith unto them, Is it lawful to do good on the sabbath days, or to do evil? to save life, or to kill? But they held their peace.
5 And when he (Jesus) had looked round about on them with
anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched it out: and his hand was restored whole as the other.
6 And the Pharisees went forth, and straightway took counsel with the Herodians against him, how they might destroy him.''
So if Jesus never sinned and he became angry,I propose this is not sinful or morally reprehensible. Anger leads on to a fork in the road,temperance or wrath and at that point we can enter into a sinful state if we engage the wrath or walk in the spirit if we exercise self control.
Point being to the OP-having no Biblical basis for condemning anger,what is the justification for this?