Sometimes, you just have to toss something out there and see what happens. There is no ethicist better at this than Stanley Hauerwas. And if he is right, then, well, we should pay attention to our liturgy, yes?

One reason why we Christians argue so much about which hymn to sing, which liturgy to follow, which way to worship is that the commandments teach us to believe that bad liturgy eventually leads to bad ethics. You begin by singing some sappy, sentimental hymn, then you pray some pointless prayer, and the next thing you know you have murdered your best friend.

Okay, I keep coming back to this but still can't figure it out. How is it murdering your best friend? Is it a joke? Context, please? I can see how by arguing endlessly about "the right" way to do it can murder a best friend....but not by singing a sappy song (even though it might feel like murder to some).
Maybe not murder, but at least hooking up with his friend's girlfriend. Ugly liturgy makes ugly people.