It consolidates it, but that means the in-group is smaller. Fascisim is a death cult in the long run as it has to keep everyone focused on an enemy, but they have to invent a new enemy if they defeat that one.

https://theanarchistlibrary.org/library/umberto-eco-ur-fascism

For Ur-Fascism there is no struggle for life but, rather, life is lived for struggle. Thus pacifism is trafficking with the enemy. It is bad because life is permanent warfare. This, however, brings about an Armageddon complex. Since enemies have to be defeated, there must be a final battle, after which the movement will have control of the world. But such a “final solution” implies a further era of peace, a Golden Age, which contradicts the principle of permanent war. No fascist leader has ever succeeded in solving this predicament.

It’s worth watching CGP Grey’s video on The Rules for Rulers. In it he explains why allies of the new rulers are tossed out when the old rulers are deposed. What makes a person good at grabbing power doesn’t necessarily make them good at keeping it.