Charles Johnson,

Mark Levin is either incredibly uneducated or lying. The words “secular sharia” along with “secular theocracy” are oxymorons.

Secularism as pointed out by Merriam Websters is,

the belief that religion should not play a role in government, education, or other public parts of society

Sharia is,

the religious laws based on the Koran that Muslims follow

And a theocracy is,

a form of government in which a country is ruled by religious leaders

a country that is ruled by religious leaders

Or

government of a state by immediate divine guidance or by officials who are regarded as divinely guided