Not only her rights, the rights of people who aren’t straight, the rights of people who aren’t cis, the rights of kids to have a decent education, the rights of indigenous people, the rights of non-whites. That’s even not to mention that they’re against providing people with healthcare so that they don’t die, against trying anything that might make this planet livable in the future (for the kids that they claim to want to protect), and against not trying to fucking overthrow democracy. I don’t need to agree with my partner’s every opinion and political ideal, but at the very least I have to be able to respect them, and throwing everyone who isn’t a well-off white man off a cliff for “lower taxes” isn’t something I can respect.
I don’t really like the take that it is solely Batman’s responsibility to kill the Joker. Batman acts as a vigilante, and in order to not take actions that one cannot provide restitution for, he has a strict rule that he cannot kill. He enforces the law but he doesn’t act like he’s the judge, jury, or the executioner. He stops them and he lets the judicial system sentence them. The people he hands over the Joker to every single time has far more ample opportunity to kill him. The police, the judge deciding on capital punishment, prison guards, a random bystander with a gun. None of them carry the same extrajudicial responsibility that the Batman imposes on himself in order to remain accountable or at least not start taking charge of life and death.
The problem wouldn’t be that the Batman kills the Joker. The problem would be when he starts deciding whether others are better off dead than alive.