Lenin believed in "pure communism" a lot like Karl Marx -the founder of communism- while Stalin was not. Stalin basically wanted to take over Russia -he was thought to be worse than Czar Nicolas- Stalin is believed to have murdered the Czar and also was bit of a '"rule-breaker" considering pure communism had no religion because it was false hope but Stalin allowed it to control the people. Stalin would murder people aginst communism and used the KGB to control people. Now back to Lenin, Lenin was aginst the war (the whole communism thing took off after WW1) and Lenin saw that after the war was a great time to carry on Marx's work (Marx passed away shortly after the war) Lenin was a great speaker and really knew how to "get the crowd going" .
The Supreme Court has ruled that the death penalty does not violate the Eighth Amendment's ban on cruel and unusual punishment, but the Eighth Amendment does shape certain procedural aspects regarding when a jury may use the death penalty and how it must be carried out.