Natural Bias
We prefer to go with “us” or with those that are like us than with “them” or others who are unlike us, because it’s safe.
There’s Hope
According to Blind Spot: Hidden Biases of Good People by Mahzarin R. Banjali and Anthony G. Greenwald, we are wired to approve what we first see as infants. Becoming aware of our biases is the first step to living peacefully. You can become aware of yours here: http://www.tolerance.org/activity/test-yourself-hidden-bias