Complex sentence: Khánh and Thi, turned a blind eye to the rioting and destruction of property, apparently in the belief the disorder to ruin the Huong government and allow them to inherit power.
Split into simpler sentences: Khánh and Thi, turned a blind eye to the rioting and destruction of property. It was believed that they did so to allow the disorder to ruin the Huong government and allow them to inherit power.