This means that God favors him. In this context it implies that God fights against the psalmist's enemies in order to protect him. AT: "God is fighting for me" (See: [[rc://en/ta/man/translate/figs-explicit]])
Here a question is used to show that the psalmist is not afraid of people, because they cannot seriously harm him. This rhetorical question can be translated as a statement. AT: "People can do nothing to me!" or "People cannot harm me badly!" (See: [[rc://en/ta/man/translate/figs-rquestion]])