Happened upon this psychological term which describes the phenomena almost perfectly:

Collective narcissists are individuals who have identified with a group of like-minded others and who, as a group, strongly believe that they are superior to others. Being a member of a group that shares a sense of invincibility, superiority, and inherent rightness becomes dangerous when they target another group whose members they deem to be inferior and less deserving of whatever benefits or resources others may access.

Typically, the group fueled by collective narcissism also perceives hostility from others and feels the need to show a threatening presence to any out-group (Golec de Zavala & Lantos, 2020). They are typically super sensitive to potential provocation or denigration and feel a need to seek revenge through force to remedy the perceived sleight of others. Researchers suggest that the use of hostility doesn’t assuage their fear of threats to their importance, but instead creates a continuous loop of perceived threat and hostile response.

Additional information.