Adam Clarke on Proverbs 21:11

When the scorner is punished - When those who mock at religion, blaspheme against its Author, and endeavor to poison society, and disturb the peace of the community by their false doctrine, meet with that degree of punishment which their crimes, as far as they affect the public peace, deserve; then the simple, who were either led away, or in danger of being led away, by their pernicious doctrines, are made wise. And when those thus made wise are instructed in the important truths which have been decried by those unprincipled men, then they receive knowledge; and one such public example is made a blessing to thousands. But only blasphemy against God and the Bible should be thus punished. Private opinion the state should not meddle with.