Your anger is useful. You can use your anger in ways that bring about the changes you would like to see.
Anger doesn't have to lead to destruction of relationships, lives, or property. It can be used to give life to something new and facilitate healing.
I saw a news story about a man in Washington DC who opened up his home to 70 protesters trying to go home for curfew who were trapped by police. He sheltered them for the entire night. He and his neighbors made sure that the protesters were cared for and fed.
He used his anger to motivate himself to address an injustice he was witnessing right in front of his house. Those 70 protesters won't forget what he did.