The dude up front probably did not notice the airplane lining up at V2, because it was nighttime. It always astonishes me how difficult it can be to distinguish a large airplane from behind in the dark. Even when taxiing behind it at, say, 100 meters!
So not spotting an airplane at 600 meters while executing a "hot visual" does not surprise me.
But I agree that the "let's fly over the CRJ" sounds more like Congo than Copenhagen.
