That entire post is an awful lot to dissect. At the moment I'd like to just address the "whether not not racism is worth fighting against" topic, and at a later time when I have more time, perhaps we can delve into the other parts.
As far as whether or not racism is worth fighting against... I suppose I could have been a little more clear with what I meant. Obviously I agree that sheer bigotry is worth fighting against, and Im sure you agree, so lets just take that out of the equation right now. What happened in America's past (and indeed, many other colonialism campaigns conducted by both white and non-white races) was horrible, and it was an agenda that was allowed to happen because one side was able to "dehumanize" another race in order to take over without giving it a 2nd thought. All of that is bad, and worth fighting against... now with that out of the way...
The part that Im not sure whether or not its worth fighting against...the part that I believe is embedded within human society over hundreds of thousands of years of evolution... Im going to take a weird example here, and then extrapolate from it... but just bear with me on this point: Have you heard of the tribe on Sentinel Island? For those that havent, they are basically one of the last (maybe the actual last?) non-contacted tribes of humans to exist. If one were to look at their skin color, someone might describe them as "black." If you were to drop a white person off on that island, the tribe would attack them instantly, as they would recognize him as "not a member of that tribe, and therefore a threat." Thats not to say that they wouldnt do the same to another black person they simply dont know, but you get where Im going with this. The key here, though, is that the tribe "See's them as different, and therefore a threat"... thats the main takeaway Im going with in this example.
There have been many interactions with humans that have yet to join "modern civilization" as we know it. Most of these tribes could be described as at least having "dark skin" if not "black" altogether. Whenever these tribes come into contact with people of lighter skin, they almost always react MUCH more cautiously than they do meeting new people with darker skin. And to be honest, who is to say that is "racist?" These people have no experience to draw on with white people that would make them react that way... they simply react because its different. Its one of those things that I find totally understandable. And although these kinds of instincts may not be applicable in modern day civilization, they were incredibly important (dare I say, almost necessary?) to have in the earlier days of man, and can be attributed to our survival as a species.
When you were young, did you parents ever give you the "dont talk to strangers" lecture? Sure, that lecture wasnt about race--they never said "dont talk to black people," but it was about the unknown. That sort of stuff starts with the individual, and then it transcends to the community, and then the general public as a whole. Now don't get me wrong, Im not saying all black people should act cautiously around white people, and vise versa--obviously that will probably cause more harm and tension than good (Im looking forward to the people who havent read this far into the post and are going to accuse me of saying whites need to avoid all blacks). But once upon a time, tribalism was simply a part of being a human. Its hard to just say "dont do that" and go against thousands of generations of instinct. And again don't misquote me as condoning all this--Im simply pointing out what it all is.
One final note. This is the kind of question that Im sure will draw a lot of flames here, as I'll admit its certainly a controversial question to ask... but lets not tiptoe around political correctness and just tackle the controversial question head on... so here it goes:
If you were to take a poll of...say..10,000 people, all of various races, ethnicities, backgrounds, genders, etc. and pose them this question:
"Youre in a dark alley all by yourself. Would you feel safer seeing a group of white men walking towards you? Or a group of black men walking towards you."
What do you think the spread of answers would be (note: not what you would LIKE them to be... what do you think people would ACTUALLY answer). And then, more importantly... why?
I have my answer ready, but Im curious to hear yours first. And I think when you hear my answer youll be surprised, as its not an explanation rooted in racism, but rather, tribalism.