@Aliceteria This happens often in real life. But in this situation it didn't look like the MC tried to prevent it in any way. Someone manipulated the masses but he offered no resistance, no investigation, didn't even defend the empire from itself. If he really had a brain, he would know that civil unrest leads to more pain and suffering rather the pain from having to arrest and execute the culprits purposely spreading unrest. Allowing the 5th column to gain momentum is a huge failure of any ruler.
Now that he's dead, a lot of people are going to die from massive corruption of the "new"(puppet most likely) government.