No, there's not a "civil war" in the Democratic party.
The "civil war" is being waged by a small number of internet activists, who have been perennially unsatisfied with the Democratic Party since the beginning of time. They see their beloved Bernie doing well, and believe that this is an indication that a large segment of the party agrees with their Hillary-hating ideology.
But this is not true. Not even close. Bernie does have very broad support, almost as broad as Hillary. But the vast majority of Bernie supporters aren't supporting him in the antagonistic anti-Hillary way that you see on lefty blogs, they're regular progressives who like his message: there's too much inequality, banks are too powerful, etc. And, as poll after poll has shown, they have a very high opinion of both Hillary and Bernie. Which makes sense, since they have similar progressive platforms and voted the same way 93% of the time in the Senate.
Is the far left going to try to throw the election to the GOP with "Bernie or Bust"? Of course. They do this every time. But unless Bernie actually tries to run third party, which he's not going to do, they're not going to have much impact. The only time that the far left has succeeded in electing a Republican is in 2000, and that's because Nader had a very high profile. But the Democratic party firmly rejected him after that, and he's been a minor fringe figure ever since.
We see, here and elsewhere on the internet, predictions from the far left that progressives have "had enough" and this time they're going to bolt. Now that Bernie's chances to win the election are approaching nil, their efforts have been diverted from trying to win the primary to trying to damage Hillary in the General.
When you read this junk, keep in mind that the people saying it have been wrong about everything so far this cycle. They were wrong about the poll trutherism. They were wrong when they said Cornel West was going to cure AA voters of their Stockholm Syndrome. They were wrong that once the debates started Bernie would roll over her. They were wrong about Iowa, and they were wrong about Nevada.
And when Bernie drops out and endorses Hillary, the Democratic party will be unified behind her, and they will have been wrong yet again.
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... the only "war" that I can see exists here. None of the Bernie supporters I know in real life behave the same way I've witnessed some behaving here.
Only a would-be little insurgency could imagine they constitute a civil war -- if they work hard at self delusion, and they do. Incredibly hard. 
Proud member of a big, unified progressive movement.
