" we all have more than …

It is very common for people belonging to the same religion to feel that they do not belong to the same community, as their caste and sect is very different. People belonging to Hindu religion are divided into Brahmin, Kshatriya, Vaishya and Sudra. People having different castes largely do not have feelings of same community. But it is possible for people from different religions to have the same caste and feel dose to each other.
Rich and poor persons from one family often do not keep close relations with each other for they feel are very different. In the example of 1968 Olympics, Tommie Smith and John Carlos were similar in one way (both of them were African-American) and thus different from Peter Norman who was White. But they were all similar in one point that they were all athletes who stood against racial discrimination. Thus, we all have more than one social group.