The we/they feeling refers to intragroup cohesiveness created by the existence of an external threat. this is most commonly caused by

The existence of another group

Intragroup cohesiveness created by the existence of a common threat, which is typically another group. This results in high cohesiveness as the members of the group feel like they have to cooperate in order to mitigate against the external threat.

answer; involves both the element of performance and interpersonal interactions;