So? Who says one has to have any "religion" to believe that Jesus was a real person? Who says that Jesus would want anyone to belong to the Christian religion, as it has evolved in the last 20 centuries? Who needs religion as an excuse to admire someone like Jesus? Who needs any religion at all in order to be spiritual?

And if they do, why harass them for it? If you want people to leave YOU alone, then leave them alone too.

And if the beliefs of those you would term "religious" people do not turn out to be quite as primitive and stupid as you would like them to be in order to fuel your argument...

Tough shit.