We need to be reminded that the authority of God's Word isn't simply a doctrine to be affirmed, but a priority to be pursued- John MacArthur
Israel's sin led unbelievers to blaspheme God. That's analogous to our society in which the Lord is constantly ridiculed because of the sins of His people.
You are the only Bible some unbelievers will ever read, and your life is under scrutiny every day. What do others learn from you? Do they see an accurate picture of your God?
Christians will always be maligned, but let it be for righteousness sake, not sin. As Peter said, "Keep your behavior excellent among [unbelievers], so that in the thing in which they slander you as evildoers, they may on account of your good deeds, as they observe them, glorify God" (1 Pet. 2:12).