"Germany established gun control in 1938 and from 1939 to 1945, 13 million Jews and others who were unable to defend themselves were rounded up and exterminated.
Sorry to disillusion you, but the liberal democratic Weimar government established gun control in Germany in 1928. Their goal was to disarm the Nazis and other militants; obviously, it didn't work. Hitler's 1938 gun laws were - in some ways - less restrictive.
Hitler didn't take over because of gun controls. He was democratically elected by the German people, and remained popular almost to the end. His anti-semitism was cheerfully accepted and even supported by most Germans.
Gun laws had little to do with the Holocaust. There never was a significant opposition which could have - or would have - taken up arms against the Nazis. In fact, the only serious opposition to Hitler came from the army, which certainly wasn't lacking in weapons!
The Weimar gun "controls" only prove how ineffective repressive gun laws can be.
