Both demand loyalty to the state. But for nationalists, the state is just for a particular nation. Imperialism rules over many nations, though normally with one dominant nation at the core. read more
Simply colonialism as practice and imperialism is the idea driving the practice. Colonialism is the implanting of settlements on a distant territory. Colonialism is where one nation assumes control over the other and imperialism is economic and political control,either formally or informally. read more