It seems to me that until the versions of his-story being taught from birth are corrected/exposed to reflect actual fact vs. translated fiction we can't expect different behaviors by those hell bent on not wishing to interact with anyone other than those who are exactly like themselves. It's all they've been taught, in many cases. Seems to be the main reason his-story repeats itself, too, from where I'm standing.
The stories appear to be some sort of comfort zone to many. As if it's the one sure thing they can hold dear and true and the one thing they can rely on above all else as being their actual roots, not to mention the plethora of jobs that are made available that are built upon the shaky foundations of deep deception. One must also pay dearly to be given the privilege of acquiring said jobs, too, be it via various degrees or via your health, or both. It seems many have totally bought into these formally taught stories and refuse to see things any other way.
As long as each race/religion/creed has it's own story that it's determined to stick with, no matter how many suffer as a result, it doesn't leave much wiggle room for minds to travel anywhere else. Those who try to change minds, even when based on facts and direct experience, tend to only serve as a prompt of sorts for folks to get angry and solidify their beliefs and judgements even more. It's a strange and very disheartening observation.