People get angry when they care about something, young one. They are angered when they are hurt because they care about themselves. They anger when their loved ones are hurt because they care for them also. They get angry if a cherished idea is dismissed.
No one gets angry about things they don't care about, there is no drive too. Don't let anger alone frighten you. It is proof there is also care, that something is valued. Not everything we value is helpful but anger can come from love for our family too. It's a part of love.