Azazel is one of the Seven, corresponding to Ira — Wrath. His domain is not rage in the ordinary sense but the systematic amplification of human capacity for violence: the knowledge of how to hurt, how to kill, what weapons exist and how to use them. In the oldest traditions, Azazel is the entity to whom all sin is ascribed — not because he commits it, but because he taught the mechanisms that make it possible. He is the instructor, not the executioner. The execution is always human.
In Helen Marsden's analysis of the Seven's coordinated function, Azazel is Ira executing dissenters. This is the enforcement arm of the operation — the mechanism by which those who get too close to the truth are removed. The execution is always performed by human hands. Azazel provides the knowledge of how those hands can be most effectively deployed. He has been providing that knowledge since before recorded history, and the record of what was done with it is the entirety of human warfare.