Can a country with a diverse population create a sense of national unity

Yes

Explanation:

A country with a diverse population can create a strong sense of national unity. There are two main ways to achieve this. On the one hand, the diverse population could become assimilated and adopt the qualities that the country takes pride in. This could occur regardless of racial or cultural diversity. The other alternative would be to celebrate diversity and create a sense of national unity based on citizenship as opposed to cultural uniformity. This is an approach most often identified with Canada.

yes because over time cultures mix and unite as one