Soldato
Bit of a difference between flying a single seat fighter and flying a 737 etc.It's usually highly experienced pilots flying these warbirds, with decades of experience. That also can make then fairly old though, so I would put it down to pilot error, not a malfunction.
Names and pictures of the crews released now. The Kingcobra pilot had been flying for the airlines since 1982 and had over 34000 hours.
For a start, airliners don’t fly in formations or close to other aircraft. ATCs start yelling at them if they get within miles of each other on converging tracks.