A question about civil laws versus religious laws: when is it right, in your opinion, to legislate religion?

In my opinion, it is never right to legislate religion except for its freedom and tolerance. However, as you know, it is rarely this simple. There are too many religious laws built into legislation today that is justified by our civil laws. Our politicians and the lawyers find legal justifications to abuse the intent of our laws. It stops only when our court system use their common sense to realize the commingling of church and state. Unfortunately, that is not an easy task.