To be frank Colonel...I have no idea what you are saying at this point....
For me it's simple...an unbeliever is someone not saved, or has lost their salvation so when Paul said if the unbeliever departs, let them..
Jesus said that in the beginning 'it' was not so...(divorce) God made them ONE and let no man divide it. So clearly God intended it to be for the lifespan of our humanity..
In the video Mr Jakes made it..UNLESS your married for the wrong reasons...