saying she’d continue genocide as a reason to vote against her falls flat …

Who’s saying that? It’s not about making the situation better or worse at this point. Neither candidate wants the genocide to stop and it’s debatable that it could be worsened. However, Harris is guilty of actively and materially supporting this genocide, which is more damning and disqualifying than any of allegations against Trump. Apart from that, losing the election is the closest that Harris and her party will get to actually being held accountable. Maybe this kind of feedback will get the Democrats to change their strategy. Maybe not. At least I won’t be cosigning genocide.