This is not about being blasé. Yes, the stance on the genocide that Harris has taken is fucking abhorrent and inhumane, and should not be accepted.
But this election is currently between Harris and Trump. Those are the only possible outcomes.
There is no outcome where this genocide ends now, and that is fucking gutwrenching. There is however an outcome that will make the probability of it ending way fucking smaller. Not choosing Harris is equal to accepting Trump, and all the shitty things he drags with him. Even if this election is between two bad choices, there is a less worse choice in this election.