Rate me MOTI, but this pisses me off so much. This is so fucking cruel.
Congratulations, not only have you destroyed something your son loved, was proud of, enjoyed, and spent over a year on, you've also irrevocably destroyed his trust in you, his relationship with you, and have given him a lifelong fear of sharing anything he is proud of or enjoys because your sociopathic, and sadistic actions have proved that it can and will be weaponized against him and destroyed.
He will now forever be secretive, isolated, afraid of sharing his like, expressing himself, or getting attached to anything because he will now be in constant fear of it being taken away. You have shown him that you do not care about his property, hard work, creativity, what he loves and makes him happy, or his feelings.
It's not about a Minecraft world. It's about you purposefully destroying something he was proud of, worked really hard, enjoyed, and loved because you failed as a parent. You have ruined your son's life before it has begun, and I hope you wind up unvisited in a home.