The saddest part is he's not that dangerous a man at all. Ideas that were once taken for granted as making sense (free or affordable college and healthcare, aversion to foreign wars, progressive taxation, taking care of the least of us) are now seen as radical and dangerous. FDR would be right at home with Bernie's agenda.
Even worse has been how complicit our own party has been in attacking him and his agenda. Our party needs to change its evil ways, or fade into irrelevance. A little better than Republicans, in this day of certifiable Republican insanity, is no longer cover. Democrats have to step up and drive a positive reform agenda for the future, one based on the interests of the planet and ordinary citizens rather than on the ability of corporations to profit off of them, or they're part of the problem.
If Bernie wasn't running, we wouldn't be having any of this conversation. Standing up for the real values of the left is incredibly important, it changes everything.
edit to add: as to your OP and your handle, hell hath no fury like an oligarch scorned.