Energy itself is neither good nor bad. Only the way it is handled can be good or bad. We can use nuclear energy for power production. Evil minds can use the same nuclear energy for destruction.
An angry person has a lot of energy. It is just that he is expressing his/her energy through anger, in a negative way.
If you have an angry friend or an angry person in your family, try to please him/her. Don’t focus on his angry nature. Look for the divinity that lies within that angry person. There is god inside every human being. By any means, try to please the god residing within that person.
Bow down to him/her. Follow each and every orders. Cook good food. Take him/her out. If you can make that angry person really happy, blessings will shower upon you. There is no doubt.