I think that there’s not just one reason we can list as why she lost. It’s complicated. The young white male demographic specifically, voted primarily Republican - which makes sense given that they’re being marketed to by republicans (think people like Joe Rogan, Andrew Tate, people like that). I almost didn’t vote for her over Gaza - and I’m sure a lot of people didn’t vote over Gaza. In regards to “All Lives Matter”, I don’t think so. I never got the impression that that “movement” was really about saying “Not just black people matter!”, it was about being an opposing statement to the BLM movement. The words “Black Lives Matter” do not say that other people don’t matter - and the movement is about police violence against black people. “All Lives Matter” was made to deny the recognition that this racial violence happens. I’ve seen it used a lot to defend police (and let’s be honest it has ties to the whole “Blue Lives Matter” thing).
I think that it depends on the person. I’ve heard of enough people who voted for Donald because they like that he “says it like it is”, or “he’s a businessman”, or because they just want lower taxes. Some people are so exposed to rage-bait social media/news content and are always being told what to be afraid of and they vote emotionally based on that fear. My grandfather votes the way he does because he’s TERRIFIED of immigrants, even legal ones - because all he does is sit and watch fox news. I think most often, people are busy with their lives, paying their bills, taking care of their kids, etc. and don’t have a lot of energy left over for politics. People treat voting like it’s team sports. A ton of people voted for Donald because they thought tariffs were paid by the other country, not American businesses. I don’t exactly blame people, it’s a lot of information and life is probably a lot more relaxed for people that don’t follow it.