I'm not aware of any grudge between Kiffin and Dabo. They're pretty much polar opposites in terms of how they embrace the modern era of football, with Dabo still trying to live in the 10-years-ago world, and Kiffin trying to exploit every loophole available. Don't know if that's enough to fuel anything. Like I said, Kiffin was only on one Alabama staff that played Clemson, and Bama won, so I doubt he's holding any grudges from that.