Moroni 7:17; “But whatsoever thing persuadeth men to do evil, and believe not in Christ, and deny him, and serve not God, then ye may know with a perfect knowledge it is of the devil; for after this manner doth the devil work, for he persuadeth no man to do good, no, not one; neither do his angels; neither do they who subject themselves unto him.”
2 Corinthians 11:13-15; “For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ. 14 And no marvel; for Satan himself is transformed into an angel of light. 15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.”
This passage in Moroni is a way to make the Bible look like it’s wrong. Again it’s taking away from the authoritative voice of the Bible and trying to make the Mormon writings better than God.