Consider:

A group that shares a posture, but differs in their occupations.
Or a group that shares an interest, but differs in their expertise.
Or a group that shares in the same struggle, but differs in their education.
Or a group that shares one belief, but differs in many others.

We’re not drawn together by our sameness, but often by our connection to just one thing — despite our many differences.

A single point of connection can be as strong a bond as any.