Beat Dump or beat up Bernie supporters?

If this Emerson polling is true, that a significant % of Bernie supporters won't vote for Biden in the general election if he's the nominee, then it could cost a Dem loss to Dump. So would you rather a loss to Dump so you can blame Bernie voters or would you rather beat Dump? Can you put aside your dislike of Bernie supporters to vote for him if you want to beat Dump? If that polling is true then voting for Bernie in the primary might be the only viable way to ensure a general election victory.