Let me deviate from the main flow of the discussion about incels because I had a talk with my spouse few days ago and I had enlightenment.
Throughout human history there have always been incels. Some had power, but most of them were lost in history pages as nobodies. In any case, the percentage of incels was smaller before industrial revolution and change of socio-economical axiom from estates of the realm to class society. The women who were bound to their village due to lack of prospect of getting out of circle of being lesser than man agreed for marriage arranged by their guardians. This was working until the social mobility of industrial revolution amassed and women had a choice to stay in village and marry some disfigured 40-year-old incel who was last bachelor in proximity or move to the city, find a job as a guardian or in factory and chose for herself the best bachelor the world has to offer. Since then the numbers of unmarried men increased. Especially in villages due to their bound with inheritance of farms left by their fathers.
Now, women still had boundaries set for millennia in society but, again, new movements like suffragettes and later feminism allowed them not only to gain equality with men but also the possibility to stay unmarried. As such was before unthinkable and women would be marginalized in society, now become tolerated and even acceptable. This leads us to modern times when most of people live in cities where women have a choice and men who were relevant for arrange marriage and, as a party, more beneficial mainly due to be a sole income deliver which also provides advantage of power in household.
Thus incels who didn't have to be charming and flattering to women of their desire but could just buy a wife or talk with guardian of maiden in village for arrange marriage became useless.
TL;DR Incels are GAY