I don't think that's it

If I had to guess he is leaving mostly due to ego, not fear. LSU told him how great he is, how much money he is worth, how much he can win at LSU and it fed right into his own thoughts about himself. That'd be my guess.

Like you and everyone else here, I don't know how he lasts long at LSU. He's going to be expected to win not just the SEC but the national championship. I'm not sure how he even wins the several big games a year needed for the SEC title, let alone the CFP. As you say: "Do they really think this guy is going to take out Alabama, Georgia and win it all in the SEC??"

LSU fired its last two coaches, both of whom won national championships. And they are going to be happy with Kelly? Uh, I don't know what to say. Maybe I'll be surprised.