This opinion would carry more weight if her own department's 16 faculty had a lot more than five white guys, two of whom received their Ph.D.s in the mid-1960s and who have been there since the Civil Rights Act was current events.

Have you considered the possibility that the reason she's making posts like this is because it sucks to be a (the only?) woman of color in a department with the demographics you describe? Indeed, might she be tired of trying to diversify the department but getting her initiatives or preferred hires blocked by a couple of dinosaurs? Or alternately, might she and the other women be stuck with all the diversity-related service work? Just spitballing here; maybe those particular white guys are great allies, but based on what I've heard from women of color in the academy, those are not implausible guesses. My point is that it sounds like you're be blaming the victim of centuries of academic discrimination for the too-white too-male demographics of her department and/or university, which presumably existed long before she was hired.