As for the mass shooter, I will tell you what I see from a nondual perspective.
If everything is one, then that means that I am not separate from the mass shooter OR his victims.
If I search my soul, I find my own shadow looming as evilly as the mass shooter's soul. I do not say "I could never be evil" because I know that the consciousness of the mass shooter IS ME in another life. I can recognise that they are evil. But I do not need to deny that this part of me exists, claiming that the shooter is an inhuman monster incapable of being understood. Indeed I CAN understand the mass shooter. This is an uncomfortable thought that most people do not want to face. They are afraid of looking at their own capacity for evil or seeing any connection between themselves and a murderer because they are afraid if they acknowledge their shadow it will overcome them. But this is not so.
If I search my soul, I find myself crying out in pain and grief with the victims of the mass shooter and their families. I know that they too, are ME in another life. And when I say "me" I mean the Godly "I Am" consciousness that is shared by all life. This resonance allows me to empathise with victims of violence and with all suffering.
Do you see Kimberley? When you look at a mass shooting and think "let's see good where there is none" and try to force darkness from your mind, that is not nonduality. When you look at a mass shooting and can empathise with both sides, that is a nondual frame of mind. But this DOES NOT MEAN sympathising with or condoning the evil acts of a mass shooter. You can still discern the causes of suffering and be against them. That is why the Buddha didn't say "don't try to help anyone, never get involved". In fact bodhisattvas devote their entire lives to trying to reduce human (and animal) suffering.
Why should you empathise with an evil-doer? People recoil at the idea, afraid that acknowledging their own dark side will cause it to take over and that they will lose control. But this is not so. Empathising with an evil-doer is essential to preventing future evil!! It helps you understand what is it that leads someone with darkness in their heart (as we all have!!!) to actually act on that evil, as opposed to leaving it in their minds. It helps you identify ways to turn people from paths of violence towards paths of compassion. It helps you identify ways that people who have committed evil deeds can do good with their remaining lives (not that this will cancel out their evil deed).
I hope this will help you understand the true meaning of nonduality and that you will stop fearing it as this scary manipulative bugbear you believe it to be.
