American culture thinks that murder is OK The US is a pro choice country. We definitely accept the death of innocent life as “the cost of freedom”, ie maintaining our way of life.
It is the same with our military. Plenty of the “pro life” contingent are not pacifists. They accept the loss of innocent life in a military action. There is a term for it, collateral damage.
It is not that the US accepts murder. Its citizens accept killing of innocents to protect their lifestyle. The game is to maximize the chance for survival of the innocent life you are sympathetic to.