Democratic primary voters were leaning a few points towards Bernie. Then the DNC gave Hillary - and not Bernie - the debate questions in advance. The superdelegates - delegates that didn't come from primaries - also tilted strongly for Hillary. So no, I don't think it's completely ahistorical. It's at least somewhat ahistorical to say that Democratic voters picked HRC over Bernie in 2016. The DNC picked Hillary. The voters? Bernie had the edge, at least before the tilted debate.
Bernie never had an edge; he lost 4 of the first 5 contests and finished with nearly 4 million fewer votes. It’s no secret the party apparatus preferred Hillary - to their great detriment given what happened in the general - but it absolutely ahistorical to insist that Bernie was somehow cheated out of anything.
It's just right wing propaganda taking its effect.
You remember that the democrats stole the election from Bernie because the GOP wanted democrats to not be excited about voting for hilary, so they spread the message as much as they could