That poor poor child, he is so obviously autistic and in complete sensory overload, I could totally see my autistic daughter behaving like this and I understand how stressful it can be to others, sometimes I wear her ear defenders when she is in full blown meltdown.
But to label a child 'demonic' and judge his parent is just the lowest of the low, she must have had a compelling reason for taking that flight as believe me, you don't take your autistic child into a challenging situation like that unless you have no other choice.