When people do horrific things they are often described as having lost their minds.
It may be more accurate to suggest that they had lost their hearts.
The mind is where acts of horror originate and grow.
If led by the heart, it would be impossible to violate or cause harm in any way at all.
The misguided souls who committed this atrocity must know this now that they have met their Maker. The rest of us can only continue to love and respect each other. What else can we do?