It’s in the article too. I don’t know if that’s a later addition but it’s there. Blackhawk pilot was told to see the incoming jet and pass behind. It didn’t.

At the surface, clear human error but it’s never that simple. Was communication missed or misunderstood? Was there another jet that looked to be where they expected it? At that altitude did things get lost in the clutter and ground lights? Was the jet really where it was supposed to be? While responsibility was passed to the pilot and the aircraft was too low for radar to be clear, why didn’t the tower scream?