"""For those who are saying America is worse than China or Russia, mind that the data of China and Russia's historical imprisonment data is not well-documented and they were more prone to using executions."""

Yes, but he also didn't add the massacres and concentration camps for Native Americans (of which, Hitler writes in his Main Kampf that it was an "inspiring" solution to the problem), or the enslavement (any different than prison?) of black slaves, and their executions, lynching.