What is a good, healthy, unhurtful, socially positive way to express anger?
Racism, sexism and all the various other "hate these people" isms and phobias are arguably methods for expressing and rationalizing anger. And they're bad. But what's a good way?
Heavy metal. Literally. Singing, listening, playing, headbanging to heavy metal. Just like listening to sad music helps with sadness because it provides a safe outlet for emotion. So does engaging with angry music. Some of the mildest, most accepting and emotionally well adjusted people I've met were metal heads. And they were social activists as well.
Listening to sad music can cause a spiral. Absolutely do not recommend unless you've specifically setup a playlist to transition emotionally and at least looked up how to do so in a healthy manner. (Like don't go from sad songs to rage metal.)