In what circumstances can intentional first degree murder be compared to murder?

in their harm, as here, but "in terms of moral depravity and of the injury to the person and to the public," they cannot be compared to murder in their "severity and irrevocability." ( Kennedy v. Louisiana (2008) 554 U.S. 407, 438 [128 S.Ct. 2641, 171 L.Ed.2d 525], citation omitted.)" ( Contreras , at p. 382, 229 Cal.Rptr.3d 249, 411 P.3d 445.) Contreras , in short, confirms that there is no crime as horrible as intentional first degree murder.