I can't see that small amount of damage to the smaller of the two aircraft in the collision being responsible for bringing down the larger plane.
The article mentions that the 737 took a drastic evasion maneuver to avoid hitting the Embraer jet. I suspect that it was mostly the aftermath of this action, in addition to minor wing damage, that caused the 737 to spiral in. Remember when the Concordski crashed in Paris, it was due to a rapid evasion maneuver to avoid the French fighter plane photographing it.
That's just my hunch, anyways. A good article. And a very sad story.
Maybe the Rule of the Golden BB is in play here.
It all depends on what got hit/damaged on the 737.