So annoyed was I at the attacks against the secular community by the pope when he visited the UK last week that I felt compelled to dig out and update my secular commandments. More info here: [link]
Basically it boils down to the fictitious reasoning that only religious people can be moral and good people because they have these rules they must follow in order to be considered a member of the community of faith in good standing.
We in the secular world have rules too, and if you break them you will be excommunicated from the community. In some instances it's because you've been thrown in jail and in others it's because people in your community and family will no longer speak to or trust you any more.