Why did protests of soviet satellite countries probably began after stalin's death and not before?

Protesting of satellite nations most likely occurred after the death of Stalin because citizens were worried about the repercussions of protesting under his reign. Stalin, a dictator, used several different tactics in order to stop individuals from protesting against him.

One tactic he used was sending any individual who he saw as a political enemy/threat to labor camps. These forced labor camps held people against their will and consisted of awful conditions.

Along with sending people to labor camps, Stalin would also have political rivals executed. Based on this information, one can understand why people of the Soviet Union would be scared to rebel against a leader like Stalin.