froggy your experiences of racism are horrendous; the same for everyone else on the thread who's been on the receiving end of racism 
The thread was about the term white feminism specifically, rather than examples of racism perpetuated by white women; though of course the two are connected. I don't have experience of racism, though I want to hear from those who do. I do have experience of people using the term "white feminist", though - mainly to refer to the idea of a past feminism which is not "intersectional" and was written only by white women.
However, that isn't true: it obscures important second wave feminism written by black women which explicitly discusses these issues as far back as the 1950s onwards, so the term also elides a lot of important work written by black women in feminist history. It also tends to get used, in my experience, to characterise any feminism that is interested in the impacts of biological sex on women's experience, childbearing and motherhood, FGM, supporting women to exit prostitution, and similar topics - hence the absurdity of it sometimes being directed at black feminist women too, such as Chimamanda Ngozi Adichie and others as pp have said above.
I can point absolutely to examples of writing by white women which are tone deaf to the lives of black women - the corporate 'lean in' Sheryl Sandberg type - but by and large those aren't serious feminist writers or theorists, though of course they have an impact on the wider culture. They're most often tone deaf to the lives of nearly all women apart from a small number of educated American/Anglophone women.
It might be that we need to know whether "white feminism" represents an actual trend in feminist writing. Or is it a shorthand for "racism by white women"? In which case I would think that isn't feminism per se, though we need a thread on that too so that posters can share their experiences and we can read them.
It might be a term that started out as a way of reorienting feminist objectives to focus more fully on race - however, it has also now become a convenient way for lots of people to dismiss feminist women or feminist concerns more generally, or types of feminism they don't like for whatever reason.
We also ought to be concerned at how easy it is for some people to use it to dismiss black feminists (in an echo of the "Uncle Tom" trope), when they articulate issues of FGM, sex-based rights and maternity rights that impact on black women's bodies; OR any kind of GC/sex-based rights feminism, white or not, which prioritises women's material experiences, the economic impacts of childcare and motherhood, sexual violence and porn. My students are nearly all privileged young white women, but they will also routinely use the term "white feminism" to dismiss any feminism that is concerned with those issues, or is perceived by them as being not "modern" (sex-positive pro-trans pro-porn pro "kink") feminism. Anything that deals with the economic impacts of motherhood, childcare, the damaging and dehumanising effects of pornography, or the subordination of women's bodies to men is regarded automatically as old and boring and not young and sexy and relevant to their lives. That seems to me to be highly counterproductive and just recirculates misogyny.
All this is not to negate the lived experiences of black women. I fully appreciate that "white feminism" is a term that means something specific to them. As a term it's also now escaped that, though, and is routinely used to dismiss women and feminism more broadly - especially when it has been happily co-opted by white men as a stick to beat any women with if they step out of the party line of "approved" thinking (centring men in feminism, etc.). It's in that context that I have experienced it; and ironically it's now used to dismiss a long history of feminist writing by women of all races, as well as individual black women when their concerns don't intersect with those perceived to be the "permitted" forms of contemporary feminism.
These are all issues women should be talking together about. What do you think, for example, of the movement by transactivists to stop women talking about FGM or maternity care because it's "transphobic"? The are issues of huge importance to many women's lives globally, but they are in danger of being systematically erased. What about the impacts on poor women's healthcare of the situation in the NHS? Cuts in funding to DV and refuge services? Disappearance of legal aid? Removal of employment protections? These aren't sexy and exciting topics to most of the young women I've seen talking about "white feminism", but they are of huge importance to women's lives.