Of course it shouldn't be called women's lives matter, that would be incredibly disrespectful.
But please, white women don't fare too well at the hands of the police. Rapes convictions are at an all time low, rape victims of all colours still have their privacy and dignity violated by police and courts (mobile phone messages scrutinised, clothes scrutinised) Rotherham etc. 100s of white girls were failed by police over decades, there have been many cases of women (white and black) being coerced and sexually abused by police who were supposed to help them when they were vulnerable. Police are notorious for not talking stalking, strangling, and abuse by men on women seriously. Natalie Connolly was brutally murdered by her partner, and her murderer got less than two years for manslaughter. This hasn't been high-profile or caused the backlash I think it should have. She was white.
Many white people stood in solidarity with black people over last summer's BLM protests.
Women are currently being harassed by police for stating that women are adult human females.
Men are being placed in women's prisons, as its thought men's feelings are more important than women's safety. Women are fighting this in the courts.
Sarah Everard going missing, then being found murdered was a catalyst for the vigils because of all of the above. Yes, she was pretty and blonde, but at another time her murder would not have triggered this response.
Yes, sadly it is less likely that a black woman's murder in the same situation, last week, would have led to this amount of action. But maybe it would have. Twitter can cause a lot of things to happen right now. A few tweets can take on a life of their own.
Everything is becoming so divisive. It's sad. I do agree it was a bit of a goady OP. I also think women of all colours are very oppressed in this society to a greater or lesser extent, and are all let down by the police and legal system, to a greater or lesser extent.