The word "sight" here represents judgment. Yahweh saw and did not approve of their ancestors' actions. Alternate translation: "what Yahweh our God judged to be evil" or "what Yahweh our God considered to be evil" (See: [[rc://en/ta/man/translate/figs-metaphor]])
These two phrases share similar meanings. The words "faces" and "backs" represent the people who turned so that their faces were away from the temple and their backs were towards it. Alternate translation: "turned away from the place where Yahweh lives" (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-synecdoche]])
Rejecting Yahweh and no longer worshiping him is spoken of as if the people had turned away from the temple. Alternate translation: "abandoned Yahweh's temple and stopped worshiping him" (See: [[rc://en/ta/man/translate/figs-metaphor]])