Something I’ve always wondered is what kind of women were in the lives of incel men when they were young. Did they have a bad relationship with their mother? Did they lack sisters or other female family members? Or is their family situation irrelevant? Maybe some particular situation in their early years caused them to develop a complex around women?
Then oversimplification by people stereotypes and lack of socialization to realize the complexity of humans and human interactions. It's so easy to consider that "all women are A" or that "some of the people are A and some are B" when, in fact, you have all sorts of people with different spectrums of beliefs and understandings that you can't just box into a category. Then, when getting together with people with the same stereotyping and labeling standards, they get to slip away together and reinforce their beliefs