The problem here doesn't lie with the Ten Commandments. Free expression including blasphemy may be tolerated in a political sense in order that greater societal vices may be minimized. But this is a prudential judgement. No one has an absolute right to blaspheme, lie, calumniate, scandalize, etc., but these things may be permitted in law ---or they may not.
This moral relativist position hardly leaves you much room to pontificate on matters of ethics.