You don't see how an organization founded to enforce a cornerstone of white supremacy may have a statistical likelihood of its members being white supremacists?
I've attempted to take your responses as made in good faith twice now, despite evidence to the contrary in other threads. I understand if this topic is uncomfortable for you, either because it challenges your world view or because it feels personally invalidating. It appears as though you're looking for one very specific statistic or logical vulnerability in what others are sharing to refute the overall claim. However, I can only lead you to water.
Your post is essential. No one is claiming 100% of cops are white supremacists. One is claiming that it's sensible to assume they are.
If 20% of cops were white supremacists, and I was a minority, it would be sensible to behave as if every encounter had a significant chance of being with someone is looking to ruin my day.
The majority do not need to be unsafe for me to feel unsafe around the community. You have to factor in the potential power they wield (to kill you or take your freedom or seize your assets), combined with the odds that one will do it because they have wrong headed ideas about race.