For police brutality to happen to black folks, police must first categorize that person as "black". And thus, it is not far-fetched to defend the idea that the categorizing of human beings is an affront to freedom - because categorization is a tool that has only been used a collectivist weapon.
This is patently untrue, because there are a huge variety of bigoted reasons police can find to brutalize people that are different, which is a fact anybody who's lived outside the social norm should be very familiar with. The statement that categorization is a tool only used as a collectivist weapon is demonstrably untrue, completely so. Categorization is necessary for human communication, and for science; by what I understand of what you're saying, the categories of "birds", "mammals", and "amphibians" are collectivist weapons, rather than scientific definitions. People of various different ancestries exist as rigidly definable categories, and we are not going to be past that until you and me are dust. The theoretical idea of cops who don't see color is beyond ridiculous, they do, and they will for the foreseeable future.
The problem isn't that we have definitions of these differences; the ideal "man who can't see color" isn't a good alternative, somebody who just sees everybody as the same homogeneous blob; people should be free to embrace and celebrate difference, and others should be able to recognize that difference for what it is and celebrate it too. The problem isn't that we're different, and recognize it, the problem is that we allow these xenophobic attitudes from our past to propagate, and try to make excuses for them, like "oh, cops just magically shouldn't see peoples' differences". Black people don't generally just want to be seen as white people, they have their own unique cultures and histories from around the world. Gay people don't just want to be seen as straight people, transgendered people don't want to just be seen as their identified gender, they want to be understood and recognized for who they are. The problem isn't that we see each others' differences, it's that people have been taught to specifically hate certain differences, because in the past xenophobia was allowed to run rampant in our country, and they seem to think that we're not allowed to say anything about that shit because "free speech".
Healthy people don't "transcend" their differences, they embrace them. A number of broad categorizations cover most of us, and are all part of our unique identity, and generally, it's okay to recognize that. You can fit into a category without sacrificing individuality.
Finally, it's a proven fact that if you look and act the part, eventually your brain falls into line. Smile, and your brain releases more happy chemicals. Dress well, and confidence improves. Don't call people n*****rs all the time, and hopefully you'll be less of a racist. There's a point to political correctness, and "social justice", and it's that the idea that our words and actions reflecting our thoughts isn't just a one-way street - if you think that's wrong, look into the efficacy of cognitive therapy. Beyond that, being publicly censured DOES have an effect on peoples' behavior, and peoples' behavior affects their thought patterns. If nobody will hang out with you because you're a racist piece of shit, and everybody makes that clear, generally you will become less of a racist piece of shit over time because humans generally want to be seen as a good person by their peers. Patterns of behavior reinforce mental patterns. Change the behavior, and you can usually affect the mental patterns.