Even after he turned good, he was still willing to kill a stadium full of people to get Kakarot to fight him. He acted like he was under control of the Majin spell but only went along with it until they started acting superior to him, then was just like, "nah, I just want to fight Kakarot because I've been training very hard and he's usually dead these days and I miss fighting with my buddy but don't tell anyone I called him my buddy, and I thought pretending to be under your control would get him to fight me, but I'm not going to bow to you or any of that shit."
Though I can't remember if he actually did kill some of them or if he just did an attack he knew Goku would stop, which would affect how evil the ruse was.