I think the original poster is correct. We all have it in us to do something horrid--believing that you are better than this shooter is a fundamental misunderstanding of the human condition.

How is saying "I'm better than this shooter" different from some fundi saying "I'm better than all you non-believers..." Both have a belief system that says that others who behave or function differently are inherently worse.

We're all humans, and we're all horrid, or at least equally capable of horrid acts... and, to some degree, capable of wonderful acts as well.