For people of color - especially African Americans - the idea that racist cops might frame members of their community is no abstract notion, let alone an exercise in irrational conspiracy theorizing. Rather, it speaks to a social reality about which blacks are acutely aware.
If you want to know if racism is a problem in your country, you might not want to ask white people.
Old white people have pretty much always been the bad guys, the keepers of the hegemonic and reactionary flame, the folks unwilling to share the category of American with others on equal terms.
Precisely because white denial has long trumped claims of racism, people of color tend to underreport their experiences with racial bias rather than exaggerate them.
Many times people will come through the door with good intentions but may not be willing to put in the work. They just want to see some results right away.
You can't organize people if you don't love them. And however hard it can be to love the racist you come in contact with; doing so is the first obligation of a white antiracist.