Now listen! All anger is not bad. Sometimes, it is good for us to get angry. It is why we get angry and how we express that anger that is the issue. Anger, managed correctly, can be an asset. God Himself got angry and gets angry and since we are created in the image of God, we will get angry as well. However, God’s anger was and is always expressed correctly and always expressed over stuff that is worthy of anger. God's anger was and is used to achieve a righteous end. God’s anger expressed is constructive, not destructive.
The gospels record Jesus expressing anger on multiple occasions, but again, Jesus expressed that anger over stuff that mattered to the kingdom and in a way that did not damage His testimony.