I completely agree with what you said about Hitler. In fact, even worse. His stealing of the word socialism for his own purposes did major damage to the concept people had of socialism. Calling a system that exploits workers and laborers socialism, when the whole idea was to put the workers in charge, damages the idea in people’s minds.
The term incel came from a bisexual woman around 20 years ago. I think she started a support group online for it. The problem was that most of the people who wanted help, got it and left. This left… the people who would not be helped and that’s what it is. Still the original incel I believe ended up with a woman, it just so happened that she was one.