A common human / spiritual / Life commonality, recognized in the spiritual/religious life, is to have respect for all life. Every day, the bad habits gained through life’s learning cause human beings to intentionally cross that line multiple times throughout a day. Someone who experiences this the violation of respect triggers anger, the negative manifestation of Love articulating boundaries.
There is more to this, as this view identifies functioning at higher levels of awareness, and only the one-point-of-view. It fails to explore what we consider the criminal-level, etc., where rage often overtakes anger. This would require lengthier discourse, and this piece assumes an audience that functions at higher levels. If rage is an issue, I will be happy to converse via email.