The justification (read: excuse) I most-often hear for this kind of behavior is that left-wing violence isn't "as prevalent" as right-wing violence. The fuck? That's like saying that because men commit more rapes, we shouldn't punish women who commit sexual assaults.
Left-wing violence, like women who rape, aren't called that so as to keep the numbers down. The reporting on shootings in the US where the perpetrator is a minority is noticeably less than when they're a white man, for example, and there are numerous places which show how when women have sex with their students, male or female, it's not called 'rape', and sometimes not even 'sexual assault'.
I believe more men commit sexual assault than women, but I also believe it's not nearly so disparate as they would have you believe, partly because women's assault gets downplayed, and partly because men don't call what they've experienced sexual assault or rape. The number of men who have been sexually assaulted, especially by women, skyrockets when you ask them if they've had certain experiences that equate to sexual assault, rather than if you ask them if they've been sexually assaulted.
Current SJW logic is that women won't lie about rape, so #believewomen. There's also many of them who don't believe women should be punished for making false rape claims, because #believewomen, so then if it can be proved a woman did lie about rape there must have been a good reason; that Rolling Stone false rape story for a couple of years back still had SJWs believing something must have happened to the girl at the centre, because they couldn't let go of the narrative of frat guys all being rape machines. They also are often very dismissive of the consequences of a man being falsely accused of rape, and seem to think that men in general deserve to be punished, so if a few get wrongly accused, well, that's just the price you have to pay.
All of that suggests that they're really not that far off suggesting exactly what you said. And like numerous outlandish positions, while they know they could never say it out loud, noting some of their actions and arguments, it seems clear that there are a few of them - not many, but a few - who do honestly believe that female sexual assault should be dismissed. Because they don't think women can assault men, because they think it's payback, and/or because they just ignore women-on-women violence.
