I don't think it's something inherent that we can't (as a species) consciously overcome. I have never heard of such justification before now, and I think having it written out emphasizes really well how ridiculous these xenophobic reactions are.
I don't think it's something inherent that we can't (as a species) consciously overcome. I have never heard of such justification before now, and I think having it written out emphasizes really well how ridiculous these xenophobic reactions are.
The Sentinelese people react violently to outsiders, but many (maybe even most) first contacts of Europeans with various natives was peaceful on the part of the locals.
There's enough variation even in just the modern world that I'd feel comfortable saying that aggressive responses to strangers/outsiders is not inherent but a feature of some cultures.
Why it's in some cultures and not others is probably a very complex topic worth investigation.
Compare speaking rudimentary French in France to speaking rudimentary Spanish in Colombia.
I think it's sort of telling what the evolutionary stance is on being peaceful and welcoming. Look what happened to the natives as a result. In fact being unwelcoming and aggressive can be seen as a show of strength, which is evolutionary advantageous.