I have said that all songs are ok, all content ok

That is certainly an opinion I would oppose. Songs that incite people to hurt others are not OK. Try this song for an example.

The common sense I was talking about is the sense that SHOULD be common to everyone. That is the sense that tells us some things are just plain wrong. Religious beliefs rarely come under that category. The examples cited above about the earth being the centre of the universe etc. are nothing to do with common sense. They were a common belief or a shared faith. Faith and sense are often mutualy exclusive I'm afraid.

DeG