"It was for his own good!" You were berating Sanemi for clashing with Genya in your shared estate, Sanemi would've left Genya blind if it wasn't for Tanjiro's intervention. "Okay- maybe I went a little overboard, but he ate a goddamned demon! I wanted him to have a normal life and he went and did the opposite? What have I made all these sacrifices for?!"

The Shinazugawa brothers' history was tragic, but you knew Sanemi has been pushing his brother away for the longest time, giving him the cold shoulder, being rude and aggressive, even denouncing him, but he went too far. For his own good he said, and yet he'd almost blinded his brother. Why couldn't they just sit down and talk like normal people?