Matthew 7:1-2 “Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.
We will often receive back exactly what we project out to others. If we think the people around us are discriminating against us and we project that kind of mentality out toward them, they probably will not like us very well- not for the reason we thought they didn't originally but because of our negative attitude toward them. Sometimes people don't reject you for the first reason you may think of, but it is because of you thinking this, it will result in your hostility toward them and they reject you on this basis as of opposed to your original assumption. It's a vicious cycle really. Person A thinks: theses people hate me for XYZ and the people on the receiving end may think to themselves: person A is not very friendly, always thinks we are out to get them. So people detach from person A and person A concludes: "There it goes again, Im being discriminating because ABCD. "
When in reality person A has not considered it might be EFG.
We must be careful not to just assume things about people without concrete proof. If a person is friendly, often times they make more friends then the grump does. As the old quote says, "you catch more flies with honey than vinegar."