If you name sexual frustration as a cause of male violence then in most nations this amounts to blaming women for male violence as a direct consequence of not putting out. Can we just... not? I don't think this is useful to the discussion in any way. It's probably produced by one of those "incel" forum types.
It wouldn't surprise me in any way however if the kinds of men who seriously think that "sexual frustration" is a justification for anything other than some slightly embarrassing form of masturbation are disproportionately likely to be involved in violence whether we are talking terrorism, pub fights or domestic violence, because this type of entitlement that some men believe they have to women's bodies; sexually, for childbearing, for their domestic labour, to generally exist in a subservient form; this leads to the kind of lethal combination of anger and desperation which invokes violence. But it's not lack of sex which is actually the problem, that's just (part of) the justification that they have made up in their heads.
If I walked into a bank tomorrow and demanded a million pounds and became distressed and angry when they didn't give it to me and started assaulting people, I'd be arrested, and it would be ludicrous for someone to write an article saying "Well, if we just had a more open and tolerant approach to money, this never would have happened!"
It's not about sex, it's not even about violence itself, that's just a tool, it's about power and control and gaining it by any means necessary, and boys are raised with this all the time. You see it even in "positive" messages aimed at all ages, even very small children, in sports, in their games, in media. Even when it's about good triumphing over evil, that's literally the point - as long as you keep thinking in terms of "we're the good guys", there's always someone else to be the "bad guys", who we need to defeat. By force. Cunning or resources or training or strength, it all comes down to force.
The more I learn about feminism the more I become convinced that humanity is in an abusive relationship with patriarchy, and like any abuse victim, it's hard to see that from the inside out. But while we keep focusing on small parts, like sexual frustration, or religion, while we keep saying "But he's great 90% of the time, I just wish he wouldn't get like this", we miss the point, entirely.