It really is about Republicans calling Bernie a commie, when all he wants is for us to be more like Norway, which is NOT Socialist by their or anybody's definition. This is Republican fear-baiting, nothing more. It's The Big Lie. Tell it enough for years, and some people will start to believe it. They certainly did that to Hillary.
We're flying electric helicopters on Mars yet you can't turn on your clothes dryer in Texas. That's because scientists are in charge of Mars, and Republicans are in charge of Texas.