Honestly, the reasoning is a little flat. But looking at the kid, he's probably a high schooler who's been oppressed his entire life and has a lot of grievances towards the world, can't help it if he's gone twisted. Environment and mentality are major factors that affects people, his situation is already pitiful and now that he suddenly realized his unfathomable power, desires for self fulfillment take over
Honestly, the reasoning is a little flat. But looking at the kid, he's probably a high schooler who's been oppressed his entire life and has a lot of grievances towards the world, can't help it if he's gone twisted. Environment and mentality are major factors that affects people, his situation is already pitiful and now that he suddenly realized his unfathomable power, desires for self fulfillment take over