Jebus, stop trying to find a single group to blame, it’s the entire god damn American public that’s at fault.
White, Latino, Blacks, Asians, men, women, Catholics, Mormons, Muslims, atheists, Republicans, Democrats, progressives, everyone in America knew who Trump and Republicans are and screwed the pooch and the entirety of America.
I don’t think “blame” is the right word here. They’re/we’re looking for reasons for how things ended up the way they did.
IMO it’s unhelpful at best and harmful at worst to look at the data and the people analyzing it and approach it as a blame thing - or even to assume it’s a finger pointing game. The facts are that the voting strategies of certain groups of people changed this election. The important thing moving forward is to understand who changed and why they changed, because then those things can be addressed.
And yeah, DNC leadership is either dumb or actively malicious because they keep pushing failed ideas under a false banner.