Took me a while to respond to this. Took a few deep breaths, and a bit of calming down, since your 'rant' is phrased is arguably the most tone-deaf manner I've seen. Rather than complain about how hard it is for you to be PC (I'll be honest, it sounds pretty similar to you saying 'Gee, it's SO hard for me to be respectful/nice/thoughtful), why don't you take a look at some of the following resources to learn a bit more about why being black in America isn't equivalent to being 'American' as you think they shoul dbe (meaning white American)?
I've gone and put some sources together for you. I suggest you read them. Maybe it will help you understand that there is a huge world beyond what you've been seeing on a daily basis. Also, would love to point out...you say you've worked with black people. Fantastic. How many of them are your close friends? How many of them have you attended weddings/births/deaths with? How many of them are considered in your closest circle of friends?
If you wouldn't consider them your best friends/family, you probably don't have any real concept of what they're going through, and probably shouldn't be trying to speak for them.
Beyond that...don't you think it's a bit insulting to take an entire group of people, lump them together into one giant group and say 'this entire group is, in my view, entirely homogenous and is represented only by this PC movement?'. Generally, both in everyday conversation and in the media, people assume that white people have different views on matters like this. Unfortunately, its often assumed that all black people somehow magically agree on these issues, as your post illustrates, by saying that people aren't from 'Africa', they're 'American', and they're all somehow one group.
1. Africa's not a country, and like Europe, each of its countries has an entirely different identity
2. Many black people in America aren't from Africa, or at least don't identify as being from an African descent so much as they consider themselves Carribean/European/what have you
3. Do you really, REALLY think that police have absolutely no racial bias? Do you really think that police treat white people and black people 100% the same? If you do, I'm happy to provide you a mountain of sources to show you that it's not the case.
Anyways, take a look, read up. I found these helpful. Hopefully they'll show you why being black in America isn't at all equivalent to being white in America, and why we shouldn't ignore that difference but understand it. This is just a small picking of articles, but there are zillions out there, and maybe these will get you started:Link 1: Quora - What's it like to be black in America?]=https://www.quora.com/What-is-it-like-to-be-black-in-AmericaLink 1: Quora - What's it like to be black in America?2. To Be Young and Black in America 3. The Exhausting Task of Being Black in America4. 10 Truths About Being Black in America