Anime fan carries out the largest massacre in postwar Japan

He is reported to have been shouting "Die!" (Japanese: 死ね, Hepburn: Shine!) as he carried out the attack.

he admitted to having started the fire,[68] possibly for revenge,[69] accusing the studio of "ripping off" or "plagiarising" (パクリやがって, pakuri yagatte) his novels.

There is no legal penalty for psycho spiritual crime.

https://en.wikipedia.org/wiki/Kyoto_Animation_arson_attack