DUmmies will never catch on that crackpot Bernie's "campaign" is entirely (though surreptitiously) created and financed by the Koch brothers and other BFEE allies.
The Sandernistas will be outraged when the inevitable nominee takes control and assumes her rightful place at the head of the ticket.
Crazy Bernie's chance of winning the nomination is zero, but he can damage the party and the Hildebeast, and very possibly pave the way for Bush III.