When did the fans turn on Kamara ?

If Kamara were just an RB, I'd agree, he's not worth big money. But he isn't. He's an 80 catch per season receiver, besides a 1,000 yard rusher. And he's a pretty good punt returner as well.

AK is effective because every defense in the league knows when he motions out to the WR spot, he isn't a decoy, or even a fourth option. He's the second option after Michael Thomas, and he's not going to run a shallow route and be the outlet option. He can go long, and has to be respected. He is the Saints' true number two receiver, and that's what makes him such an important player.

He needs to stay. You could argue that in holding out he is just going for the big money. But he's also giving the Saints an extra year to keep him, by doing this now. He's saying he wants to be paid, but he'd prefer to be paid as a Saint. There's an opportunity there to strike a fair deal. He deserves it. He's the best RB the Saints have ever had.