What is the reason for a religion to have to be nationalized or enforced by military and laws?

what other countries are already full blown theocracies, or what other nations are being transformed by dominionism and nationalism (blending religion, patriotism, fascism, law) into this currently? who are these activist pushing to change the USA form a nation with laws that protect religion to laws that promote one religion? (which means all others become a threat or political oppostion)