Russian Civil War: Leaders
A power grab left him with most of the control in his government. Which then gave him the responsibility of making choices.
Even though his country grew stronger, his decidions lead to the deaths of thousands.
Were all the lives lost really worth it?
The second thing that leads you to that breaking point is quantity.
Stalin hit his turning point when he killed thousands of people for his idea of what government should be.
The turning point is not a defined by a number of people. It is when you see death and it doesn't hurt anymore because you find that your cause is more important.