After that silly poll claiming Britain was a “Christian country”, after many public figures disagreed, I rather like Tim Minchin’s response, given to the British Humanists:

Even if Britain was a Christian country (it isn’t); even if “Christian values” were meaningfully distinct from the moral values of humans worldwide (they’re not); even if promoting religious doctrine improve moral behaviour in modern society (it doesn’t); even if all these were the case, the fact that this rhetoric is being spouted by Mr Cameron would surely make the socialist, leper-lover iconoclast, Jesus Christ, roll in his grave (had he not so famously vacated it).
It gives way too much credit to a first century religious fanatic (if he existed at all), but I get the point.