But that was in Louisiana

 I wonder if the local DA would be as understanding if 4 felons home-invaded a house in Maryland suburbs of DC?  Or if a jury here would be as understanding as a jury there.

Technically, they should.  There is Castle Doctrine, even in Maryland.  But only for the past dozen years or so. We used to have a duty to retreat.  Even in our own home.  

With regards to the justice of the thing, they should.  

But you second guess em here.  I bet you wouldn't sleep at home that night.  If you were lucky, you would the next.