Hikigaya action of breaking off all of his relationship with the World Government had emboldened certain thought of the leaders of many factions.
That is because right now, Empire of Japan is free from the world power. It is like a beacon of a new era.
A few people likened the world powers expansion and rule as the colonial rule during the Age of Discovery.
It is Death Monarch that draws the border of the world, enthroned seven Emperors of the world
Even though each of the great powers never claimed to be Emperors, to the people of the world the leaders of the seven great powers are emperors of the world
Regardless of what slogan these organizations shouted, whether it be freedom, a unified world government, or a republican haven, it did not change the fact that there is a person at the top that rules over those below them.