brutalised and callous

Goblet: Sentence out of "Good or evil – what is human nature?"
... This does not apply to human beings who have become entirely brutalised and callous as well as irresponsible and conscienceless, something which also applies to those who kill as legal executioners or soldiers, knowing the judicial or military command is at their back and incorrectly believing that their actions are rightful, which means that they do not develop a guilty conscience. ...