About "rape culture" and victim blaming--
Of course rape victims weren't "asking for it" and didn't deserve it; and of course Travis didn't deserve to be killed. HOWEVER, every person must take some responsibility in maintaining their own personal safety and security, for using reasonable caution and judgment, and evaluating the riskiness of their own choices and behavior.
If a girl dresses very provocatively and behaves in a very sexual manner around a bunch of drunk makes in high crime areas ...that's very risky behavior; it's consciously putting yourself in a dangerous situation. If the girl gets assaulted, it's not her "fault" and she didn't deserve it -- rape and assault are crimes and the responsibility lies with the one who commits the offenses -- but the girl increased her chances of being a victim by engaging in high risk behavior. If the girl thought nothing bad would happen to her, she did not realistically evaluate the risk.
Somewhat similarly, Travis engaged in risky behavior by continuing a volatile relationship with a clearly unstable young lady. It's not his fault she murdered him and he didn't deserve it. He thought he was safe and that he could keep engaging with Jodi as he did without being harmed, but he did not realistically evaluate the riskiness of the situation he placed himself in.
Bottom line -- criminals are criminals and they are the only ones accountable for their criminal acts. But everyone has a responsibility to themselves to use good judgment and not engage in risky behavior that increases the chances of becoming a victim of a violent crime.