People can behave terribly. For some, it’s because they have legitimate mental illness (and even when seeking treatment) can still fall prey to moments when they truly fail to hear their own voices over the din of their afflictions. For others, it’s because they allow their actions to be controlled by an irrational notion that they are acting in some form of noble servitude.
When there is no control over the one thing in life that we have control over, our choices, reason is submerged without the realization that in the moment, our hands are doing the drowning. In either scenario, however, actions of unsound reason are not absolved from consequence. Ownership is not absolution.