This is the first bit of one of those ACLU articles. IMHO it doesn't sound like anyone is being "dumped", rather, the ACLU is choosing to focus on a particular audience. Which there are a lot of legitimate reasons to choose to do.

Also the statistical makeup each community is going to vary; so in some places you might be correct about "half to a local majority" of the community being white (not sure if that's what you meant), in other places, it'll be the other way around.

"The increasing use of surveillance technologies by local police across America, especially against communities of color and other unjustly targeted groups, has been creating oppressive and stigmatizing environments in which every community member is treated like a prospective criminal. Many communities of color and of low income have been turned into virtual prisons where residents’ public behavior is monitored and scrutinized 24 hours a day."