THE DOOR WAS OPEN!
So what if the homeowners left their door unlocked. If you leave your keys in your car by mistake, is it still a crime if someone steals it? Yep.
Unlocked. Not open.
In either case, it doesn’t not matter one bit.
The guy entered the home and would not leave.
In your mind, an unlocked door = permission to enter. . . ?
Unlocked, not open...