By the way If you would like to SEE, and/or UNDERSTAND, WHY 'your claims' here are NONSENSE in regards to WHY it is a so-called 'human instinct' to show EXTREME brutality towards "outsiders", then by all means let me KNOW.
But, if you are just interested in seeing anything I have to say here but then will just tell us what you think, or believe, is right, then that is NOT very interesting AT ALL. I much prefer, and thus much more INTERESTED, to SEE what ACTUAL PROOFS exist for what 'we' both SAY, and CLAIM, here.
Also, what could be called a 'human instinct' would HAVE TO BE some 'thing', which SEPARATES 'human animal' FROM ALL OTHER 'animals'. And, showing brutality towards "outsiders" is NOT ONLY uniquely 'human'. In fact what IS uniquely 'human' is the ABILITY to SHOW LOVE, CARE, and PROTECTION of and for absolutely EVERY 'thing' ELSE, or what 'you' might call "outsiders" here "harbal". NO other animal has this ABILITY.