No one attacks without the intent to hurt. Cruelty becomes protection. You mean to hurt others to have freedom. You attack because of fear. Fear of invasions or fear of a feeling. You are looking for freedom from fear. Freedom from feeling your own inadequacy.
If it is you that is lashing out, talk it out with someone who is sympathetic to you. If you are the victim of this type of lashing out let it go because they are hurting and have bad people skills.
Let it go.
This is paraphrased from a section in a Course In Miracles. Poor behavior is reflection of the person doing the wrong action. It is not a reflection on the intended victim.