I don't think that's accurate. Many, maybe most democrats wanted national health care. Everyone I know wants it except my boomer parents and in-laws who of course have national healthcare via medicare. Some people used scare tactics against Bernie. People used scare tactics against HRC, Biden, and Trump. None of them were some "official national democratic party" - the dems have many factions.

"Democrats" were not against health care. Some dems wanted a different candidate to win, and they argued against Bernie. Some dems were against Biden and argued against him too.