I agree, totally undeserved bashing on this one.
Malkin is crusing back by his own net on defense (what? some folks say he never comes back past the blue line), the puck goes behind the net, he makes an attempt to cut it off, it hops over his stick unexpectedly (it hops goes past Downie as well).
Malkin has a choice now. He can pursue behind the net or attempt to go to the front of the net, or check a point man. Downie is already on the far side of the net. He heads to the front of the net, probably from years of coaches yelling "don't chase behind the net".
If Malkin pursues, he's behind the net when the puck goes in. His play is totally unrelated to this goal. If his goalie makes a save, he's in a position to help check, clear a rebound, or cover a point man.
Now, you want the *real* goat on this play? #14 in red. The last one into the frame, the other four Russians are attempting to defend, while he's just lollygagging into the play. Finally, he appears, gliding in the face off circle while Downie is coming out from behind the net, directly at him. #14 slows down, bends over at the waist, and limply waves his stick in Downie's direction. Downie scores.
With a little bit of skating by #14, and a little bit of hitting, Downie never gets that shot off.