Leave God out of it.
Cousins is in DC because Washington has already given him $44M guaranteed for two years.  A deal he would never have gotten anywhere else.  As a comparison Luck got $47M guaranteed for SIX years.  Why would he ever agree to $29M (more) guaranteed for 5 years, when he gets $34M guaranteed for ONE year if they franchise him again next year or if he gets let go he stands to be in the $60M guaranteed category as the only upper half QB in free agency (not to mention he will still only be under 30)? 
God isn't going to tell Cousins to leave DC, Daniel Snyder is.