Some Christians still want to have blasphemy laws in my country. It's only a small minority, but it's more than a few. Modern judges see these laws as a violation of the establishment of religion and violation of free speech. But original intent judges FWIW view blasphemy laws as permissible under the First Amendment, believing they were meant to preserve public peace not compel belief. What people don't realize about these laws is that they were originally crimes against religious doctrine and the Church of England, and are defined as "the offense of speaking matter relating to God, Jesus Christ, the Bible, or the Book of Common Prayer, intended to wound the feelings of mankind or to excite contempt and hatred against the church by law established, or to promote immorality" (thelawdictionary dot org). So you have to first tell us what the one true religion is before allow these laws. (Though Clarence Thomas in an opinion once said that if a state wanted to say Buddhism was the established religion, he'd be all right with that.) Now Saudi Arabia has lobbied since 1999 for an international "defamation of religions" law. But critics have pointed out that a law like this could be used to suppress freedom of expression and persecute religious minorities. They also fear it could endorse the domestic blasphemy and apostasy laws that exist in many conservative Muslim countries and harm the people already persecuted that way. Living in the US we thought we'd never be talking about the legality of contraception again. And some day we might be talking about blasphemy laws again too.
