There is no restriction of caste, creed, age, color, or language. Samvara means to stop the flow of ashrava. Once we know how it works, we stop it. The house will be filled with dust and dirt and rainwater. Samvara means to close the windows when the storm is about to come.
Anger is a storm.
When it comes, first it upsets our own peace. Then it destroys what is around it. Anger distorts, blinds, and prevents clear vision. The person whose heart and eyes are burning with anger does not like anything beautiful. Smile at the person, and you will see that your smile is not tolerated.