It's also a thought experiment taking place during a short, discrete moment of time on the track. What if you stretch out the track by years? The path that seemed good before may have way more people tied to it in the long run.

That's how I saw it if the Dems felt they could get away with doing a genocide forever without a political consequence. I mean, it's hard to get much worse than that, but if the Dems feel they can do anything as long as it's one step less out loud evil than what the fascist Republicans are doing, and the Republicans keep sprinting right as fast as possible, there's literally nothing that will stop them from later abandoning those other groups people liked to put on the trolley as being saved if Harris got into office.