Leaders have to make it clear to their team that there are lines that should not be crossed, and if they do cross them, they're on their own.
The honor of the country and the teams is more important than an individual's stupidity or nefarious behavior.
Leaders who fail to clarify the lines and consequences for crossing them will suffer the consequences.
The speaker feels comfortable because he knows his team understands the lines he's drawn, and he will not tolerate any behavior that puts them in danger.
The Code of Combat: Moral, Ethical, and Legal Leadership and Conduct in War. Jocko Willink and Leif Babin.