I can't think of any such event where the issue came down to having a list or not.
We can see a similar thing happening with ICE raids: do they have clean and tidy lists? No, they're supposed to know what they're doing, but in practice they're just going after anything they want, anyone that crosses their path, and they don't stop at any specific criteria. We had testimony of arrest quotas, and random people shoved in to clear the numbers.
There will always be a convenient target when the point is cruelty.
[edit: rephrased last part]
Do you really think handing the loaded gun to the chimpanzee is ethically ok, and the same as if you didn’t?
The reason ICE is flailing around is because the information we are talking about doesn’t exist. They’re changing data gathering to collect it.
That is literally the point.