Making the land unacceptable to Yahweh is spoken of as if it were physically polluting the land. AT: "Do not make the land where you live unacceptable to me in this way, because blood from murder makes the land unacceptable to me" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This refers to when a person intentionally kills another person. This can be stated in active form. AT: "When someone has shed blood in the land, only the execution of the murderer can make atonement for the land" (See: [[rc://en/ta/man/translate/figs-activepassive]])