I think that arguing over the isms is not productive, personally.
The police in the end are not interested in helping lots of different groups of people. Class does have impact. Race. Sex. Religion. Disability. Etc.
In the end my view is (and sure others will disagree) that the role of the police is to protect the interests of their paymasters. And due to the inequalities in society, the group that form their paymasters tend to be white, older, male, certain types of education, live in certain areas, without long term disabilities etc etc
On class my anecdata is reporting a crime from my home Vs my parents. The first, nothing happened. The second, two officers came out immediately, were very nice and sympathetic, spent ages etc etc. Down to postcode.
In the end it's the white wealthy education etc who the police are there to protect. Not the rest of us. Often they would see it as from the rest of us.
The met is my force my whole life. I'm nearly 50. They have failing after failing after cover up after lying year on year under their belts.
Every time it's lessons learned blah blah.
I can't see what good at all they do for the lives of the general population. And their awful behaviour just keeps being revealed over and over.
I note that there is a bit of ?? saying maybe the initial police response and the lack of attention from the press was actually not out of line under the circs.
There is no doubt in my mind that it became reported on more widely and seriously once their mother started talking about it, as she had a voice due to her role.
Whether they would have searched earlier for different women that age? Not sure.
But they posed with their bodies for selfies. And sent them to others in the police in watsapp. They had been brutally murdered. That is just. I have no words for that. And the POLICE did that.
Sorry this is long.
Bottom line is that change will only come if the remit of the police is genuinely to investigate and uphold the law irrespective of who the probable perpetrator or victim is. And to have massive reform to totally change the culture.