30 seconds into the earshcplittenloudenboomer crap that is "John Lennon & Yoko Ono - Cambridge 1969" and you know why Chapman shot Lennon.
Yoko Ono controls minds. With Banshee wails. She's powerful.
I'm sure he pointed the gun at her, intent on permanently eliminating the waste that is that Japanese .
She wailed. She entered his mind. He changed his target. He shot Lennon.