These insecurities manifest themselves in our disparaging others. In many people's world of values, pushing someone else down is the same as raising oneself up. It seems unlikely that kindness and respect are part of a zero-sum game, nonetheless, this is a fairly prevalent attitude. But they also lack several human qualities that enter into the survival equation, namely compassion, conscience and altruism. Humans are different from all other animals.
Survival means survival of the species.
And, ultimately, this will likely depend on the strengths of all ethnic groups and cultures. It perpetuates a misunderstanding of human nature. I don't think so. While many of us turn a skeptical eye towards groups that are different from ours, whether it is because we feel threatened or not, it is precisely the wrong response. Any culture or ethnic group that has survived for this long, in all likelihood, has learned a few things about life.