Pundits are all like "actually, many establishment Dems *agree* with Mamdani" after he wins, like Dems didn't just shovel $10 million and four dozen Cuomo endorsements and several defamatory shadow campaigns against him.
Mamdani won because the Dems have finally alienated enough liberals and enraged enough young people that they're becoming a marginal party in their own "strongholds".
That, to them, this means they have to go "hard right" is totally nuts.