"But clearly more people should've stood up in Germany, but by the time most people realized what was happening Hitler had enough thugs to control the population."

The greater German population didn't have to be "controlled". They were all in on the National Socialist program. The Gestapo was sent to the conquered provinces of the Reich because they weren't needed in Germany. There were zero strikes, riots, or sabotage against the Nazis, who were publicly using slave labor from the concentration camps that everyone could see. British intelligence couldn't find anyone in Germany who wanted to start a resistance cell. The German military aristocracy made attempts on Hitler's life because they were watching estates that had been in their families for 800 years fall into the hands of the Red Army.

The scariest thing about the Nazis were how readily the best educated population in Europe went along with their program.