The truth is sociopaths do not connect sex with emotion, because they have a great deal of difficulty connecting with any kind of emotion unless it's something that immediately and directly affects them. These incels, being men, and being sociopaths, and not understanding that they are sociopaths or what being a sociopath means, think that how they feel is how all men feel.
This come from something that is not connected with sociopathy at all, but rather 99% of the human species. We have a strong tendency to apply our own thoughts, our own believes, our own experiences, and our own motives, to the things we see other people do. We've probably all done it, looked at someone's actions, and made an assumption about why, based on how we thinks about things. I know I have. I'm trying to improve, so see things from other perspectives, to try to understand what someone else is thinking and why. Partly because understanding them makes it easier to deal with them in a healthy way, most of the time. But also because in some cases, when there is no healthy and productive way to deal with a particular toxic individual, understanding their thought processes instead of trying to impose my own, will make it much easier to protect myself from them. That much easier to fight them, because they become easier to predict.
If instead you follow the line of reasoning laid out in old Saturday morning cartoons, where you are the great shining hero protecting everyone, and anyone opposed to you is just an evil jackass who finds joy in everyone's misery, you can never really follow what your enemy is doing, and so never see what they are likely about to do. This is why these incels consistently fail, because they think they are these heroes, and everyone who has ever questioned their reasoning is Shredder and Mumra rolled up into a big mass of cucks trying to destroy their ability to get the sex they can't get . . . because they so often turn around and tell a woman who might be considering dating them how she should be proud to get on her knees and suck his cock.