Complex sentence: The Indian National Congress, the main organization of Indian nationalism, praised Bose's patriotism but distanced themselves from his tactics and ideology; although, Bose's ideology was more complex, many in the Congress believed he had collaborated with Fascism.
Split into simpler sentences: The Indian National Congress, the main organization of Indian nationalism, praised Bose's patriotism but distanced itself from his tactics and ideology. Although, Bose's ideology was more complex, many in the Congress believed he had collaborated with Fascism.