A Course in Miracles Topic - Anger

Anger is an ego device to proclaim its innocence while at the same time justifying its attack. ACIM responds that anger is solely your responsibility and is never justified. 

You have probably reacted for years as if you were being crucified. This is a marked tendency of the separated, who always refuse to consider what they have done to themselves. Projection means anger, anger fosters assault, and assault promotes fear.     T-6.I.3:1-3.

… anger recognizes a reality that is not there; yet is the anger certain witness that you do believe in it as fact. Now is escape impossible, until you see you have responded to your own interpretation, which you have projected on an outside world.               M-17.9:7,8. 

Perhaps it will be helpful to remember that no one can be angry at a fact. It is always an interpretation that gives rise to negative emotions, regardless of their seeming justification by what appears as facts. Regardless, too, of the intensity of the anger that is aroused. It may be merely slight irritation, perhaps too mild to be even clearly recognized. Or it may also take the form of intense rage, accompanied by thoughts of violence, fantasied or apparently acted out. It does not matter. All of these reactions are the same. They obscure the truth, and this can never be a matter of degree. Either truth is apparent, or it is not. It cannot be partially recognized. Who is unaware of truth must look upon illusions.         M-17.4.

Projection and attack are inevitably related, because projection is always a means of justifying attack. Anger without projection is impossible. The ego uses projection only to destroy your perception of both yourself and your brothers. The process begins by excluding something that exists in you but which you do not want, and leads directly to excluding you from your brothers.   T-6.II.3:5-8.