let's not start using the term 'incel' as if it's a valid concept. it isn't. no one is owed sex. we already *have* a word for those who call themselves 'incel': 'misogynist'
Incel hate or resent everyone who is able to have relationships. They probably have a specific flavour of resentment for women but that isnt just misogyny. I also suspect they hate/resent themselves to a large extent. Makes them all the more dangerous.