Question

when does social difference become social division?

Answer 1

when they overlap one difference over the other

Answer 2

When does a social difference become a social division ... In other words when two or more social differences, join together, it turns into a social division, e.g., the difference in the blacks and the whites in America is due to their different races which is a social difference. It becomes a social division when, say, the income factor is also seen.