There are people that wear their anger like a pair of socks. They put them on first thing in the morning and take them off the last thing at night. The use anger as a power whether they feel that life has cheated them of what they deserve when it has given them exactly what they deserve or that is the only way they believe they can get power.
Most of us do not know how to handle an angry person except to avoid escalating the situation to the point that we become the target. We will do almost anything to avoid that and rightly so when we think of the results of their anger. Physical abuse, death, mental abuse, maiming in extreme cases and intimidation, verbal abuse, and fear in other cases. Who would not want to avoid that?
There can be no true relationship based on fear or irrational anger and the instigator only builds a wall between them and everyone else. There is no success possible through confrontation as it only escalates the situation and the only person that can fix the problem is the person themselves.
Recognizing that we are in that situation is important and realizing that there are people both professional and personal that will help us. We simply need to ask and let people know who can help. We are never alone unless we ourselves make it so.