"...folks who thought voters should blame the Biden administration (and Kamala Harris, the eventual nominee negotiating for a ceasefire in '24) for what Netenyahu eventually did under Trump."
I don't understand this statement. The facts are pretty clear that Netanyahu did not have to wait for Trump to inflict the vast majority of damage to Gaza. By every metric of the death and destruction of war, the first 15 months were the most devastating and grotesque. Perhaps you didn't watch the daily atrocities and didn't see that shredded child hanging by a hook on the wall, and many other hellish scenes, as I did. In any case, facts and figures which I won't recite here prove my point.
And while Kamala said she was working tirelessly for a ceasefire, she also said that her commitment to Israel's security was 'iron-clad and "unshakeable". But voters wanted both a ceasefire and conditioned funding or even an arms embargo and they already figured out Netanyahu was not interested in a ceasefire unless he was pressured or threatened with consequences! I happen to believe that Democrats are smart people - they recognized a Catch-22 and a losing, disappointing strategy when they saw it.
I would not presume to think Democratic voters are so weak-minded that they would be influenced by "demagogues" one way or another. I think Democratic non-voters made up their own minds, based on what they saw with their own eyes - shredded kids and a moral disaster for their party. That would tend to be somewhat demoralizing and suppress voter turn-out.
"....that issue in the election was a deliberately diverting and divisive canard, considering the republican opposition and the abdication of responsibility we've all witnessed from them.:
Opposition to the war and asking your President and then your candidate for conditioned funding or an arms embargo to protect Palestinians from war crimes and slaughter was a distraction and divisive? And it was irrelevant anyway because... it was all the fault of republicans?
I don't know quite the term to describe this line of thinking but denialism or revisionism comes to mind.
In case you're interested, here is a very insightful and fact-filled scholarly article that might disabuse you of these notions. No, it does not present a pretty picture so if you read it, keep an open mind. But it is reality - it's what happened and the sum total of it all was just too demoralizing for a lot of people who never made it to the voting booth.
https://onlinelibrary.wiley.com/doi/10.1002/waf2.70009
"...Democrats need to remind voters that their energy and efforts aren't mired in the fate of some nation or interest other than the United States and our people."
That's not what voters saw, quite the opposite. It's a bit ironic that you put it that way...
Aside from every other rotten consequence of the disastrous Gaza/Israel foreign policy, it's clear to me that the road to Iran (and don't forget Lebanon!) started in the ruins of Gaza and the unconditional support for Israel. There should be some lessons learned here for the Democratic Party, but that won't happen unless there is open and honest discussion and TAKING RESPONSIBILITY - no denialism or revisionism - whatever it takes to bring back those lost voters and restore faith in what the Democratic Party stands for.