I mean... There is some truth to it considering that men do commit most of the violence out there. I don't believe it should be applied to even a small percentage of men, considering that in many countries a gun isn't even a typical item to own. I'm afraid that most incel men either spend their time online spewing hate, or end up depressed, unhappy or even doing self-harm in real life.
To be completely honest, I don't feel 100% sorry for people who disrespect and humiliate others, like incel men/women actively hate men and encourage violence against them. But I do feel partially bad about everyone who suffers emotionally and mentally. I wish there was less red-pilled male incels, and less hateful women too (not sure what a female incel looks like... I don't believe I've encountered one yet).