Why are people, generally men, sometimes more horrified by rape than murder? Doesn't that imply the rape victim would be better off dead, that their life is no longer worth living? Well, here's my take on why some men (including me) are more horrified and angered on a visceral level, and it doesn't imply that at all.
First, there's the impact on society. The existence of murder doesn't shape human interactions the way the existence of rape does. Everyone in society is impacted by it in ways they have to keep in front of them all the time, in almost every interaction between genders. In the case of men that impact shapes our interactions in ways I think we resent even more than women. The reason it produces such seething hatred for rapists in some men is that men are suspected in everything they do, as a class. The suspicion is unfortunately the only prudent course, which leaves all women paying the price by being suspicious and all men paying the price by being suspected. Men are also blamed as a class. All too frequently a rape victim is blamed and that's very bad and very stupid; I've yet to hear women as a class blamed (which would be even worse and stupider). However, men do get blamed as a class; here's a few examples I've seen recently:
Yes, there should be more "blame" placed on men. While not every man is a "potential perp", there are a LOT of ways "non-perps" condone and encourage the offenders. source here in comments
The key to preventing rape is, you know, for dudes to stop raping. source here in comments
So, part of reacting to rape worse than murder is probably just a way for men to distance themselves from it more emphatically. But mostly, it's a reaction to someone who caused all that social attitude. It amounts to "I'VE SPENT MY ENTIRE LIFE BEING SUSPECTED AND BLAMED BECAUSE OF WHAT YOU DID, YOU SICK EVIL BASTARD!" Not usually on a conscious level.
Second, there's a philosophy or psychology of crime reason. The horror of a crime is not determined solely by the harm to the victim. If a perp kills someone, or if he kills someone then rapes the corpse, the victim is not more harmed in the second case, but there's a lot more horror. Also motive comes into it. People find it less horrifying when someone poisons their rival to the inheritance of a fortune in an Agatha Christie mystery than when someone clubs someone over the back of the head to steal their sneakers. Some people have a particular horror of rape because so much is being taken for so little. Another reason is that in some cases the victim's real psychological agony is stimulating to the perpetrator; some of us find that unspeakably revolting.
Third, there's a failure of imagination, especially in men; and I think for this part we have to think about the boys they used to be. Boys think they can imagine death, sometimes the hero dies, but they have the impression that rape is worse than they can imagine. Therefore it must be worse than death. It's reinforced by what they learn about sexuality, such as the value of female virginity and the idea that sex is more that touching some body parts with some other body parts. Boys are taught that sex acts are really an enormously big deal, even though the boy's involvement seems only cool and greatly desirable. So since it's not the boy that makes it a big deal, it must be that girls are incredibly, incomprehensibly, special. So how can they imagine how bad rape must be, except in terms of being much worse than they can imagine?
So yeah, there are reasons (not actually good reasons, but reasons) that some of us are more horrified or infuriated by a crime that objectively at least leaves the victims alive. And they don't come with an implication that life as a victim is no longer worth living.