The people scold Saul. This rhetorical question can be translated as a statement. Alternate translation: "Jonathan has just accomplished this great victory for Israel. He should surely not die." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This exaggeration shows how the people of Israel would protect Jonathan and keep him safe. This litotes can be stated in a positive form. Alternate translation: "we will protect him from any harm" (See: [[rc://en/ta/man/translate/figs-hyperbole]] and [[rc://en/ta/man/translate/figs-litotes]])