What happened when Naheed and her family arrived for the 9/11 ceremony?

Naheed and her family find a place to stand where they can watch the proceedings. A large white man carrying an American flag confronts them and tells them to leave the country. Will and Sergio go to stand with the family. Then a whole bunch of firemen come and stand next to the boys. A young mother with her baby strapped to the front of her body joins them, and then an old man and old woman. Eventually, there is a large crowd of people standing in front of them.