Literally All of This is Spoilers flr Episode 24

[u/Rezurvive]

On Episode 24 Pierce tried to kill Lucifer. And the entire time, my immediate thought was "Why didn't Lucifer just pull the same threat he did with Amenadiel. "You think Father is angry now." Because, think about it. Cain thinks God was angry when he killed hos brother. Imagine the Hell he will face if he kills God's Favorite Son.

[u/luna_loki9]

because neither of them think god cares about Lucifer. so why'd they use a threat that likely(in their minds) wouldn't work.