I've never seen a white feminist (or black tbh) throw white men under the bus when it comes to injustices where black/brown women or men are the victim. However I do see tons of white feminists go extra hard on black men.
Black feminists are the main ones who end up caping for white men. It's just as bad as these goofy negros with the pawg fetish.
Yeah this is where intersectionality gets tricky. I think the majority of white women feminists are selfish (but as are the majority of every grouping of people). So unless they can find a direct way in which an action or policy harms them, they are prone to ignoring it. If white men are blocking their progression, which is the majority of cases, then they will go after them. If black men are blocking their progression, they will go after them. If black women are getting in the way of their agenda, they will ignore them. The majority of targets I see white feminists going after are white men, simply because they interact with white men more. If you want to get equal pay, your boss who is stopping that is most likely going to be a white man. If you want to not be sexually assaulted, the perp is most likely going to be a white man. If you want to have the right to get an abortion, the legislator who is stopping that is most likely going to be a white man. Black men simply don't exist in their world in enough numbers to be their primary targets.
What's important is to make the distinction between feminism and white feminism. Feminism is a universal philosophy that applies to every woman. White feminism is a cultural phenomenon that has whittled feminism down to serve only a distinct segment of women. You can fully be a feminist
and critique the way white women have ignored and marginalized minority women.