When people throw out gun control by Hitler, I think they imagine that at a point, German, not Jews, would have overthrown Hitler. I'm not sure of that at all. He had propagandized the regular people to where they believed in his plans. They didn't know Jews and others were being killed. You have to look at the context of the times and how people living in those conditions felt. I think Germans were tired of the poverty their nation endured after World War I.
Slaves were kept by relatively few people. Slaves relied on owners for everything. They were beaten into submission. If they fought back, they were killed or tortured. People get beat down. When we are weak, we do that which is necessary to survive. Slaves would run sometimes, and some made it to freedom, because many Americans hated slavery and would risk everything to help the runaways.
I don't think statistics matter in these cases. Slaves never used guns. Most German people did not use guns. They had been under the rule of royals for many generations. They did not have the background of personal freedoms and responsibility that had become the norm in America. Freed slaves have had a few generations of being free, but also being "kept in their place" by society. Germans, to, were "kept in place" by their class and social position.
One thing that set America apart from any other country except Canada, is that you were not stuck in the economic class you were born into. It was quite normal to raise your income level through work and education.