If “faith in Christ” should sometimes be re-rendered “the faithfulness of Christ” (e.g., Romans 3:22), should “believe in Him” be rendered “be faithful to Him”? That’s no minor soteriological point.
If “faith in Christ” should sometimes be re-rendered “the faithfulness of Christ” (e.g., Romans 3:22), should “believe in Him” be rendered “be faithful to Him”? That’s no minor soteriological point.