I think Karl was a Ranadive hiring, another example of the rookie owner making rookie mistakes when in the fire.
Remember what Carmichael Dave said about the night before the Kings hired Karl. That he talked outside with D'Alessandro and was told that the fans are getting what they want, they are getting Karl, but eventually they are going to have to pick who they want to keep, Cousins or Karl. This doesn't sound like a guy really on board with the Karl hiring, it was just his job to get it done.
I don't think anybody directly convinced Ranadive to hire Karl, we needed a coach as things were falling apart and Karl was the biggest available name that a lot of people wanted at the time, many on this web site actually. He listened to the fans, he wants to please the fans. He really needs better advisors than he has had in the past, hopefully Divac is that advisor.