There
are non-incels who commit massacres, but that's
in spite of the fact that they're having their sexual needs met.
What's certain, and undeniable, is that if you'd give a gf to an incel who's about to go on a mass-shooting, then he
wouldn't follow through with the mass-shooting.
If Eric Harris got a prom date, he'd easily have found her vagoo more interesting than LARPing
Doom in his high school.
If Nikolas Cruz's girlfriend didn't dump him and cuck him, he wouldn't have shot up his high school, either.
There are innumerable examples where the intervention of a roastie would have prevented bloodshed. But, as it turns out, roasties only find incels like Eric Harris and Nikolas Cruz to be interesting
after they throw their lives away, as a form of social signalling; they would never actually date these men in real life, but they signal about loving them after they commit their massacres in order to fit in with their nymphomaniac peer group, which defines "high-status" in a man as the extent of the violence he's committed ("high-status," of course, is the prerequisite quality in a man necessary for a woman's love).
Ironically, this all endears nymphomaniacs to stereotypical bad boy Chads more often than anything, but some of them LARP as being "not like the other girls," and disingenuously project psychopathic qualities onto brutalized incels who snap, turning them into the female equivalent of "waifus," or sexual icons based entirely in the imagination. What Becky nymphomaniacs really want is a bad boy Chad who abuses people just for the sake of it, but since they're too ugly/fat to get bad boy Chads, they pretend that incel spree-shooters are bad boy Chads, ignoring the whole context of their actions.
If nymphomaniacs ever start committing massacres themselves (unlikely, though
there has been a failed attempt), they would be the only people to commit mass-shootings
precisely because their sexual needs being met, given that they consider mass-shootings to be a sexual fetish of theirs.