So, I absolutely agree with you on the first point. I think it's critical to not let cynicism overtake us and to cede political battlefields forever just because they presently look unwinnable. It's very hard to do in practice sometimes, especially right now when we look all around us and see the constant advance of right-wing extremism and authoritarianism, and the way the right wing manipulates people with culture-war wedges, and can't see the political path forward to universal health care. But giving up on real progressive political ambitions like that just because they are politically unrealistic sort of allows the Overton window to be shifted against us.
I do disagree if you believe the recent history of Dems is "focusing on identity politics over other things." I'm not saying Dems haven't made mistakes in that regard but I don't think that's the story of the 2024 election in particular. Pubs led with identity politics far more than Dems and it won them the election. If there's anything the Dems miscalculated in going too hard on in 2024, personally I think it's the "threat to Democracy" stuff, which was important to lawyers like me but not to many other people, for whom it was simply too abstract. It's not that the fears weren't legitimate - the last two weeks have made that abundantly clear - but that the message simply wasn't working for voters in the way the Dems thought it would.