Let me ask: have politics ever been separate from religion?

The earliest civilizations tended to have religious edicts as their basic code of laws.

Many early religious laws were based, at least in part, on public policy grounds (ex: not eating pork to avoid trichinosis).

Most laws are based on a moral or philosophical underpinning. In turn, the vast majority of people get their moral or philosophical views from religion.

Is this all a big smoke screen? Is the "separation of church and state" merely a (sometimes) comforting illusion?