By saying ACAB people are stating that community police, highway patrol, detectives, cyber, specialist forces are all bastards. It's a ridiculous statement that doesn't help address anything. So you need to address specifics, gather themes and drive that agenda (e.g. police response in crowd control is excessive and should be condemned). ACAB is pointless and simply an attempt to evoke emotion.

Sure, I agree peer accountability is also important. This comes down to education, training, and culture. But let's not all pretend that in our workplace we pull up everyone. Let's not also pretend that what my peer does is equal or representative to what I do