Stalin
It took Adolf Hitler until the early 1930's to gain political power in Germany. Joseph Stalin was part of the Bolshevik October Revolution in Russia in 1917. Stalin held important political positions , even a dictatorship in the USSR by 1930. To answer the question then, Stalin came first.
No, Hitler and Stalin never met.
Stalin and Hitler were both equally violent.
Joseph Stalin and Adolf Hitler were both in favor of what?
With Hitler he was a socialist. He had nothing in common with Stalin.
Joseph Stalin and Adolph Hitler were both Communists.
Stalin and Hitler agreed on dividing Poland in the beginning of the second world war, and then Stalin was betrayed by Hitler, and they became enemies.
The issue on which Joseph Stalin and Adolf Hitler did not agree on was property ownership
On the contrary, Hitler lied, or more accruately decieved, Stalin. He attacked and invaded Stalin's country (the USSR), and not vice versa.
hitler turned on stalin to get more power during the war, with made stalin an allie.
Stalin had a bad childhood not bad as Hitler though
if you mean what did Hitler do after he MET Stalin, he tried to convince him to become an ally, which of course did not happen.