Complex sentence: Nevertheless the participants of the rebellion were harshly punished, Tsar's government continued its policy of the support of Muslim nobility and clergy, to prevent similar as a result of religious oppression in future.
Split into simpler sentences: Nevertheless the participants of the rebellion were harshly punished. The Tsar's government continued its policy of the support of Muslim nobility and clergy, to prevent similar uprisings as a result of religious oppression in future.