Here the killing of people is spoken of as shedding their blood, where "blood" represents their lives. Alternate translation: "killed many people" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "sight" refers to what God has seen. Alternate translation: "I have seen that you have shed much blood on the earth" (See: [[rc://en/ta/man/translate/figs-metonymy]])