This has to be some kind of 4chan joke like Free Bleeding, right?
No, it’s not. These incels are real, and they want to kill off people who are more sexually successful than they are.
Note: incel was originally a term describing all involuntary celibates. However, the term has come to be associated with the male subset thereof that harbor hatred and ill will toward women and the men who are successful with them.
Full disclosure: I am unfortunately celibate also, but I certainly do not want to be associated with these psychos. Therefore, I would prefer to refer to myself and other decent-minded male celibates as bachelors (the way it used to be) or “designated bachelors.”