Crowley simply raised an eyebrow, just a little bit, at the emphasis in Kol's tone. Okay, so he wasn't going to go and provoke the overly emotional hybrid with no manners, but he didn't think Kol would have that strong a reaction to Crowley leaving it alone. "You're welcome," he murmured in reply, dragging on the cigar to hide the faint smirk that was threatening to appear on his face.
He blinked though, looking confused. "So, he was involved in this giant plan... to kill himself? Seriously? What kind of moron was he? Because really, that's just a level beyond stupid and I do get so irritated with people like that." He eyed Kol a little. The whole bloodline death thing. And who hadn't seen the littlest Gilbert and his ranting. "the bloodlines thing. That's what Gilbert killed you for, right?" A flare of something that could be protectiveness came up. "You know, if I did end up ruling hell, I could do something about that. Him. And his continued breathing status."
Ah, promises. Kind of like deals, in a way. And Crowley understood those better than anyone. Though souls weren't really at stake with a promise. "Your brother is more than a little delusional. And I say this as someone who knew Lilith quite well, and her belief that Lucifer is a good thing. Someone, not me obviously, but someone, might want to tell your brother that rotting in a box is the very opposite of protecting."