I reacted similarly to @yhcranasilla (Keith Hart) when I first read a bunch of the decolonization stuff. So I hear where you are coming from. There is a lot of complexity to this conversation, and I think some of us white folks are jumping into the middle of an age-old conversation in Native communities, without the Native context. To us, it can feel very off-putting to have people identify you as "white" and then go on to say that white people need to "go back to Europe" or some more extreme versions of decolonization. There are absolutely decolonization essays/movements that are on the more radical end of forcing white people off of this continent. I'm still wrapping my head around the entirety of decolonization, in that is is similar to rewilding; there are many different thoughts and ideas about what it means, and how to go about doing it. For a lot of us people who have been acculturated as "white," it is difficult for us to start out in these "advanced" conversations about race and privilege. I say advanced, because there is a whole pre-contextual conversation and understanding that needs to take place before we jump into the depths of decolonization. I was initially very put off by it, and thought of it as "racist." It took me a good long while of talking with Native people and other People of Color, as well as taking a step back and just observing before really starting to understand the whole picture of it.
For the sake of discourse, I would like to respond to a few things you (Keith) said specifically.
"IF evolution is correct then it's survival of the fittest"
This is a very out-dated perception of evolution. While it persists in the mainstream consciousness, it is not accepted as the reality of evolution by biologists. It most likely persists in the mainstream because it translates the older mythology of Divine Right into modern "Science." Instead of White Christians believing god gave them this land, we now have atheists believing that it is the natural process of evolution. This is just not the case. In order for organisms to survive in the long run, they must "fit" into their ecosystems and not destroy them. Civilization is more akin to Cancer, which is a malfunctioning immune response that causes cells to reproduce at a rapid rate that eventually kills its host. Thinking that civilization is more "evolutionarily fit" because it murdered everything in its path, is like thinking that cancer cells spreading through a body are more evolutionarily fit. It doesn't make sense. Evolution is a process of "organisms finding ways to fit together through environmental changes" (aka natural selection). I wrote about how civilization does not "fit" and how this is not an example of evolution a long time ago in this chapter from my book: http://www.urbanscout.org/civilization-vs-rewilding/
Racism isn't just a person from one race hating another. Racism is a word that describes race on a systemic level. 58% of the US prison population are people of color, even though they are only 25% of the entire US population (http://www.naacp.org/pages/criminal-justice-fact-sheet). That's racism. 80% of people in power are white in the United States (https://www.washingtonpost.com/news/the-fix/wp/2015/01/05/the-new-congress-is-80-percent-white-80-percent-male-and-92-percent-christian/). That is racism. Native Americans suicide rates are higher than other populations (http://time.com/4054087/suicide-rate-american-indians/), that's current racism, that's current colonialism.
Racism isn't just using the N word, or flying a confederate flag. Racism is a systemic reality that equates to privileges within civilization. It is a sub-section of the class system. Just because we have had a black president, doesn't mean racism doesn't exist. In fact, the more we equate racism with people who use the N word, the more systemic racism continues to be invisible. We live in a racist system, where white people are in power and people of color are not. Therefore, a person of color cannot be a "racist" because the label falls on those who are in power, exerting that power over people of color. This power isn't seen by an individual, because it's not just something an individual does, it's a power that is held collectively among people who pass as white. Being born white in the US or anywhere in the world really, gives you more power than other people. This doesn't mean that all white people are born with a silver spoon in their mouths (I certainly wasn't) or that all white people are both with an able body (I wasn't) or that all white people receive this privilege all the time (I haven't). But generally speaking, whiteness is a huge privilege. This is a great article on this topic: http://everydayfeminism.com/2012/12/how-to-talk-to-someone-about-privilege/
Vikings didn't colonize because it was "in their blood." They did so because of a cultural system. Not DNA.
Please refrain from using the term "mongrel" on this site. Mixed race or Multi-racial are preferred terms. Mongrel is considered a pejorative by a lot of people, and while you may be okay with using it, we are creating a space here where people who may be triggered by that word can feel safe.
Hitler was a nationalist who created a mythology of "German People" based on Roman propaganda (Tacitus' "Germania"). He used this mythology to gain power as a fascist, among the disenfranchised German population. When I read a lot of the decolonization stuff, I can see how it could be perceived as "white people go home." and lead to similar analogies to the rise of National Socialism, but it isn't. Decolonization is about indigenous people gaining sovereignty & control over their traditional territories. Which, who can really argue with that? While it isn't rewilding per se, and isn't anti-civ per se, it's along the same thread. There is a de-programming of race and systemic racism that is central to decolonization, and I think central to rewilding as well. If we want to dismantle the power structures of civilization, in order to rewild, we need to decolonize our minds first. There seems to be this idea that Native Americans are completely colonized and have nothing to teach us about sustainability or what it means to be indigenous, and it stems mostly from white people who can't figure out how to make friends and allies in the Native community (HINT: I used to be one of these people).
That's all the time I have to respond for now. Here are some further thoughts on this subject:
Thanks for listening.